The work done by tension force in pendulum is zero.
We need to know about pendulum experiment to solve this problem. The pendulum is a simple experiment to calculate gravitational acceleration.
The work done is proportional to force and displacement. It can be determined as
W = F . s
where W is work done, F is force and s is displacement.
From the question above, the given parameters are
mass is m
string of length is l
angle is θ
F = T
s = 0
In pendulum motion, there is no displacement so the work done by the tension force is zero.
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9. Which of these motions would be an example of 1D motion?
A ball being kicked off a hill
b. A football being kicked through the goal post
A ball being thrown up into the air
d. None of the above
True or false. An airplane can fly in space. True False
Answer:
the answer to this question is false because a airplane wouldve survive in space
Which is a type of fundamental force?
friction
spring force
normal force
weak interaction
According to the research, the correct option is weak interaction. A type of fundamental force is weak interaction.
What are fundamental forces?They are those that cannot be explained based on other more basic ones, where the particles interact by virtue of some characteristic that they possess and according to physics, four fundamental forces are recognized at the quantum level:
GravitationalElectromagneticStrong nuclear forceWeak interactionIn this sense, weak interaction is manifested in the transmission of particles where neutrinos and antineutrinos are emitted, without electrical charge and whose mass is very small or even zero, as in the case of the photon.
Therefore, we can conclude that according to the research, the correct option is weak interaction. A type of fundamental force is weak interaction.
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a man accidentally kicks a pebble off a cliff that is 18 m high with a horizontal velocity of 2.3 m/s. How long does it take to hit the ground below?
A pebble off a cliff to hit the ground below t = 0.128 sec.
Equation :Given,
distance = 18m
velocity = 2.3m /s
time = ?
To find the time in given data,
Use formula,
velocity = distance / time
Putting the value in formula,
We get,
2.3 m/s = 18 m / t
t = 2.3 m/s / 18 m
t = 0.128 sec
Velocity :The vector quantity velocity (v), denoted by the equation v = s/t, measures displacement (or change in position, s), over change in time (t). Speed (or rate, r) is a scalar quantity, denoted by the equation r = d/t, that measures the distance traveled (d) over the change in time (t).
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A 0.7500 cm diameter plastic sphere, used in a static electricity demonstra-tion, has a uniformly distributed 60.0 pc charge on its surface. what is the potentialnear its surface?
For a 0.7500 cm diameter plastic sphere, used in a static electricity demonstration, the potential near its surface is 144V.
CalculationV= kq/r = 9 x [tex]10^{9}[/tex] [tex]\frac{6*10^{-11}}{0.00375}[/tex]
=144 V
What is potential?The magnitude of the potential point per unit charge is the electric potential at a specific point. However, the following definition is far more accurate: The amount of work required to move a unit positive charge from infinity to a certain place is known as the electric potential at that location.
Potential is characterized as a thing’s potential to materialize. The greatest grades to which a specific student is capable are an illustration of potential.
What does voltage’s potential mean?The external effort required to move a charge in an electric field from one position to another is known as an electric potential difference, or voltage.
The difference in potential energy experienced by an object is known as its electric potential.
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One way to control avalanches is to send explosive charges to key areas on mountain slopes to trigger small avalanches before larger ones can build up. Norway, for instance, uses solar- powered launchers that fire pre-timed charges. Your launcher fires charges at an angle of 70 degrees from the horizontal and a speed of 200 m/s. If you fire a charge and it travels a horizontal distance of 300 m away from you, how high up the slope will it strike?.
By using uniform motion, the high up the slope will it strike is 730.62 m.
We need to know about uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
θ = 70⁰
vi = 200 m/s
x = 300 m
Find the initial velocity in x and y axis
vx = vi cosθ = 68.40 m/s
vy = vi sinθ = 187.94 m/s
Find the time taken to reach 300 m
vx = x / t
68.4 = 300 / t
t = 4.39 second
Find the time taken to reach maximum height
vt = vo + a . t
0 = vy - g . t
vy = gt
187.94 = 9.8 . t
t = 19.18 second
The motion of projectile is raising to maximum height, hence
s = vo . t + 1/2 . a . t²
h = vy . t - 1/2 . g . t²
h = 187.94 . 4.39 - 1/2 . 9.8 . 4.39²
h = 730.62 m
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011 10.0 points
The acceleration due to gravity on planet X is one fifth that on the surface of the earth.
If it takes 4.6 s for an object to fall a certain distance from rest on earth, how long would it take to fall the same distance on planet X?
Answer in units of s.
If it takes 4.6 seconds for an object to fall a certain distance from rest on earth, then it would take 10.29 seconds to fall the same distance on planet X.
What are the three equations of motion?There are three equations of motion given by Newton,
v = u + at
S = ut + 1/2×a×t²
v² - u² = 2×a×s
Keep in mind that these calculations only apply to uniform acceleration.
As given in the problem, The acceleration due to gravity on planet X is one-fifth that on the surface of the earth. If it takes 4.6 s for an object to fall a certain distance from rest on earth, then we have to find how long would it take to fall the same distance on planet X,
By using the second equation of motion given by newton,
Let us suppose the acceleration due to gravity on the earth is 10 m / s²
S = ut + 1/2at²
= 0 + 0.5×10×4.6²
= 105.8 meters
The acceleration due to gravity on planet X = 2 meters / second
S = ut + 1/2at²
105.8 = 0 + 0.5×2×t²
t² = 105.8
t = 10.29 seconds
Thus, it would take 10.29 seconds to fall the same distance on planet X
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True or False?
To every action force there is an equal and opposite reaction force is the law of conservation of momentum.
How long does it take moonlight to reach earth given that the distance to the moon is 384,000 km?
10. A girl cycles for 30s at a speed of 4 m/s. Calculate the distance she travels.
Answer:
120 m
Explanation:
4 m/s * 30 s = 120 m
A car moved a total distance of 120 km in 90 minutes (1.5 hours). What was
the speed of the car?
OA. 45 km/hr
OB. 30 km/hr
OC. 60 km/hr
OD. 80 km/hr
find the energy u of the capacitor in terms of c and v by using the definition of capacitance and the formula for the energy in a capacitor. express your answer in terms of c and v .
Let's take into account the volt-volt potential difference between the plates and a capacitance capacitor.
C farad, we can raise the fee
q1 to q1+dq1
between the positive and negative plates.
the instantaneous potential difference will be
V1 = q1C
The finished work will be d
W = V1dq1
The capacitor's total charging effort from the uncharged state to the finished state q will now be
W =∫q0q1Cdq1
=1C[q122]
q0=1C[q22−0]
=12q2C
We are aware that the entire quantity of work done is defined by potential energy.
The potential energy will be
U=W=12q2C
As a result, the capacitor's energy is
U=12q2C.
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Cassie walked to her friend's house with an average speed of 1.40 m/s. The distance between
the houses is 205 m. How long did the trip take her?
Answer:
146.4 s
Explanation:
Distance / rate = time
205 m / 1.4 m/s = 146.4 s
C6H12O6 + 6O2 6CO2+6H2O + energy Which statement correctly compares the reactants and products of the equation?
The true statement about the equation of respiration is:
The mass of the reactants is the same as the mass of the products; option C.
What is respiration?Respiration is the process by which living organisms break down large molecules such as glucose into smaller molecules such a carbon dioxide and water to release energy in the form of ATP.
Respiration are of two types in living organisms:
Aerobic respiration which requires oxygenanaerobic respiration that does not require oxygenThe equation of aerobic respiration is given below:
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + energyIn the given equation above, glucose reacts i the presence of oxygen is broken down into carbon dioxide and water and energy is released.
According to the law of conservation of mass, the mass of reactants is equal to the mass of the products.
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Note that the complete question is given below:
Respiration describes the process that living cells use to release energy by combining sugar and oxygen. The primary chemical changes that happen during respiration are shown in the equation below.
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + energy
Which statement correctly compares the reactants and products of the equation?
Which statement correctly compares the reactants and products of the equation?
A.
The mass of the reactants is less than the mass of the products.
B.
The mass of the reactants is greater than the mass of the products.
C.
The mass of the reactants is the same as the mass of the products.
D.
The number of reactant molecules is greater than the number of products.
If two robots are racing on a 100 meter length straight line track. One is traveling two times as quickly as the other robot. What could be changed other than speed that would allow the slower of the two robots win the race ?
Change in the starting time of the robots for the race will allow the slower robot to win the race.
Robots are any autonomously run machines that eliminate the need for human labour, even if they may not look like humans or carry out tasks in a way that is humanlike. Robotics, then, is the branch of engineering that deals with the creation, maintenance, and use of robots.
Although the idea of synthetic people predates written history, the term "robot" is derived from the Czech word "robota," which means "forced labour" or "serf," and was used in Karel apek's play R.U.R. (1920).
Runaround, a work of science fiction by Isaac Asimov, introduced the word robotics (1942). It established a new level of plausibility regarding the possible difficulty of creating sentient robots and the potential technological and societal issues that might arise, along with Asimov's other robot stories.
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Show your work on the following problems.
1.
An airplane accelerates down a run-way at 3.20 m/s? for 32.8 s until is finally lifts off the ground
Determine the distance traveled before take-off.
2.A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. De
acceleration of the car and the distance traveled.
3.
A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the
acceleration of the car and the distance traveled.
4.
A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of
the rifle, the bullet moves a distance of 0.840 m. Determine the acceleration of the bullet (assume a
uniform acceleration).
The distance travelled by the airplane before takeoff is 1721 m.
2. The acceleration of the race car is 11.2 m/s², and Distance travelled by the car is 79.9 m.
3. The acceleration of the bullet is 1.62 * 10⁵ m/s².
What is the distance travelled by the airplane before takeoff?The distance travelled by the airplane before takeoff is determined using the formula:
s = ut + ¹/₂at²
u = 0; a = 3.20 m/s², t = 32.8 s
s = 0 * 32.0 + ¹/₂ * 3.2 * 32.8²
s = 1721 m
2. The acceleration of the race car is calculated as follows:
a = (v - u)/t
v = 46.1 m/s, u = 18.5 m/s, t = 2.47 s
a = (46.1 - 18.5)/2.47
a = 11.2 m/s²
Distance travelled, s = 18.5 * 2.47 + ¹/₂ * 11.2 * 2.47²
s = 79.9 m
3. The acceleration of the bullet is calculated as follows:
a = (v² - u²)/2s
where v = 0 m/s, u = 521 m/s, s = 0.840 m
a = (0² - 521²)/2 * 0.840
a = 161572.0238
a = 1.62 * 10⁵ m/s²
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URGENT!! ILL GIVE BRAINLIEST! AND 100 POINTS
The diagram below shows a portion of the electromagnetic spectrum. Which of the following statements correctly explains the relationship between FM and AM radio waves?
Answer: The difference is in how the carrier wave is modulated, or altered
Explanation:
With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM, the frequency (the number of times each second that the current changes direction) of the carrier signal is varied
couldnt read that so gave my input hope it helps or is closly related to one of the answers
Answer: C. FM radio waves carry more energy than AM radio waves. This is supported by the fact that FM radio waves have a shorter wavelength compared to AM radio waves.
Explanation:
Which object will accelerate less if the
same force is applied to both--an
apple or a couch? Why
If we apply same force to both-an apple or a couch, the object which will accelerate less is couch.
What is acceleration?
Acceleration is the term used to describe the pace at which speed and direction of velocity vary over time. Something is said to be accelerating when it starts to move faster or slower. Even when the speed is constant, motion on a circle accelerates because the direction is always keeps shifting. Both impacts cause all other motions to speed up.
The couch will accelerate less because
F = m a
where, F = force, m = mass, a = acceleration.
This equation can also be written as
a = F/m
It tells us that the acceleration is inversely proportional to mass.
so, in the question given the mass of couch will greater as compared to an apple so the acceleration of the couch will be lesser as compared to apple.
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Suppose that a classroom has 10 light bulbs. The probability that each individual light bulb works is 0. 6. Suppose that each light bulb works independently of the other light bulbs. What is the probability that all 10 of the light bulbs work?.
The probability is 0.006
The probability of a light bulb that works is 0.6 and that a bulb would not work is 0.4 (0.6+0.4 = 1.0)The key to this question is the state that says each bulb's working condition is independent of others.That means you could treat the probability of a bulb individually towards the final/asked probability.You may recall your memory of the fact, the probability of 2 individual events happening at the same time is given by [tex]P(A\cap B) = P(A)\times P(B)[/tex], and this is applied to 10 events here in this question.You only need to focus on the happening that each bulb works and if that happens, only the probability of a bulb that works is to be considered.Therefore, the probability of all bulbs working would be calculated as follows,
[tex]\begin{aligned}\\\\P &= 0.6\times0.6\times0.6\times0.6\times0.6\times 0.6\times0.6\times0.6\times0.6\times0.6\\\\&= 0.0060466\\\\&\approx0.006\end{aligned}[/tex]
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Can an object with constant acceleration reverse its direction of travel? can it reverse its direction twice? in both cases, explain your reasoning
Answer:
It is not possible to change direction twice, given constant acceleration. To convince yourself, imagine any general v−t graph - it would be straight line in case of constant acceleration. Change in direction corresponds to v going from positive to negative or vice versa.Explanation:
Answer:It is not possible to change direction twice, given constant acceleration.
Explanation:To convince yourself, imagine any general v−t graph - it would be straight line in case of constant acceleration. Change in direction corresponds to v going from positive to negative or vice versa.
a wrench 0.3 meters long lies along the positive yy-axis, and grips a bolt at the origin. a force is applied in the direction of ⟨0,−3,1⟩⟨0,−3,1⟩ at the end of the wrench. find the magnitude of the force in newtons needed to supply 100 newton-meters of torque to the bolt.
The magnitude of the force in newtons needed to supply 100 newton-meters of torque to the bolt is 359N.
What is magnitude of force?The amount that encapsulates the force's power is known as its magnitude. Consider the following scenario: the force is 10 N in the east. The direction is indicated by "towards east," while the force is indicated by "10." Magnitude may be thought of as simply the "value" or "amount" of any physical quantity.
The force applied that applies torque is:
Fz = 100 N-m / .3m = 333.33 N
Find the angle:
theta = tan^-1 ( 5/2) = 68.19 degrees
Total force:
F= 333.33 / sin(68.19) = 359N
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A wave as represented by the equation Y = 2 sin π (0.5x - 200t) Where all distances are measured in cm and in Second. For this wave, calculate a) frequency b)wave length C )Speed d) Amplitude e)period f)wave number g)angular velocity
By calculating, a) frequency = 100 Hz b)wavelength = 4 cm C )Speed = 400 cm/s d) Amplitude = 2 cm e)period = 0.01 s f)wave number = 0.5π g)angular velocity = 200π.
Given in question
Y = 2 sin π (0.5x - 200t)
Y = 2 sin (0.5πx - 200πt)
Comparing it with the standard form of a wave equation:
Y = Asin (kx - ωt) where
A= amplitude
K = wave number = 2π/λ where λ = wavelength
ω = Angular velocity = 2πf where f = frequency
We get
a) 2πf = 200π
f = 100 Hz
b) 2π/λ =0.5π
λ = 2π/0.5π
λ = 4 cm
c) Speed v = ω/k
v = 200π/0.5π
v = 400 cm/s
d) A= amplitude = 2 cm
e) period = 1/f = 0.01 s
f) K = wave number = 0.5π
g) ω = Angular velocity = 200π
Therefore, by comparing a) frequency = 100 Hz b)wavelength = 4 cm C )Speed = 400 cm/s d) Amplitude = 2 cm e)period = 0.01 s f)wave number = 0.5π g)angular velocity = 200π.
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A ball is thrown horizontally from the top of a
building 110 m high. The ball strikes the ground
74 m horizontally from the point of release. What
is the speed of the ball just before it strikes the
ground?
Answer in units of m/s.
The speed of the ball just before it strikes the ground is 46.4 m/s
Motion Under Gravity
Motion under gravity is also known as vertical motion. The gravity act only on the vertical component of the velocity.
Given that a ball is thrown horizontally from the top of a building 110 m high. The ball strikes the ground 74 m horizontally from the point of release.
The time taken for the ball will be
h = ut + 1/2gt²
but u = 0
110 = 1/2 × 9.8 × t²
110 = 4.9t²
t² = 110 / 4.9
t² = 22.45
t = √22.45
t = 4.74 s
The speed of the ball just before it strikes the ground will be
v² = u² + 2gH
v² = 0 + 2 × 9.8 × 110
v² = 2156
v = √2156
v = 46.4 m/s
Therefore, the speed of the ball just before it strikes the ground is 46.4 m/s
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the circuit directory gives the " " in a wording that would be clear for "nonelectrical" people to decipher and identify the circuit number for luminaires, receptacles, appliances, or equipment.
The circuit directory shows the load/area in a vocabulary that would be clear for "nonelectrical" people to decipher and determine the circuit number for luminaires, receptacles, appliances, or tools.
What is load divided by area?True stress is the spread load divided by the actual cross-sectional scope of material. Engineering strain is the applied load separated by the original cross-sectional area of material. Also known as nominal stress.
What is area in stress formula?As expected by the units, stress is assigned by dividing the force by the location of its generation, and since this area (“A”) is either sectional or axial, the basic stress formula is “σ = F/A”.
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5) A ball is thrown into the air vertically from the ground level with an initial speed of 20m/s. (a) How long is the ball in the air?
(b) What height does the ball reach?
The time spent in air by the ball is 2.04 seconds.
The maximum height reached by the ball is 20.41 m.
Time of motion of the ballThe time of motion of the ball is calculated as follows;
v = u - gt
where;
v is the final velocity of the ball at maximum height = 0u is the initial velocity of the ballg is acceleration due to gravityt is time of motion0 = u - gt
gt = u
t = u/g
given;
the initial, u = 20 m/sthe acceleration due to gravity, g = 9.8 m/s²t = (20) / 9.8
t = 2.04 s
Maximum height reached by the ballThe maximum height reached by the ball is calculated as follows;
v² = u² - 2gh
0 = u² - 2gh
2gh = u²
h = u²/2g
h = (20²) / (2 x 9.8)
h = 20.41 m
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PLEASE HELP ASAP!!! A hiker walks 12cm North in 2 hours what is his velocity?
Answer:
[tex]\boldsymbol {\boxed{v = 12 \ \dfrac{\text{ km}}{\text{hr}} }}[/tex]
Explanation:
Data:
t = 2 hr
S = 12 km
Find:
[tex]v \ - \ ?[/tex]
-----------------------------------
Solution:
[tex]\boldsymbol {\boxed{v = \dfrac{S}{t} }}[/tex]
Calculations:
[tex]\boldsymbol v =[/tex] 12 km / 2 hr = 6 km/hr.
Answer: [tex]v =[/tex] 6 km/hr.
Two tiny spheres of mass 5. 30 mg carry charges of equal magnitude, 62. 0 nc , but opposite sign. They are tied to the same ceiling hook by light strings of length 0. 530 m. When a horizontal uniform electric field e that is directed to the left is turned on, the spheres hang at rest with the angle θ between the strings equal to 58. 0∘
Answer:in this situation we have during the two tiny spheres of masks, 5.8 mg carry Charges of equal magnitude 30 77 Nano column but opposite in sign They are tied to the same ceiling hook by light in spring of 2.53 m. It is known that when they original uniform electric village applied that is directed to the left. The angle between the springs is 58°. Then we have to find the value of E. So given that the mass M is 5.8 mg, that is 5.8 into 10 to the power -3 g. And This is five and we have the charge that is Q. Is 77 and a column. So this is 77 into 10 to the power -9 columns. The length of the string is 0.53 m. And the angle between the spring.
5) Explain cell phone charging transformation:
Answer:
Charging a phone is the exact opposite of discharging a battery's energy. By supplying current (the manipulated variable), a charger transfers lithium ions from the positive electrode to the negative electrode, thus restoring energy
Explanation:
this is a multi-part question. once an answer is submitted, you will be unable to return to this part. a piece of plywood in which several holes are being drilled successively has been secured to workbench by means of two nails. knowing that the drill exerts a 29-n·m couple on the piece of plywood, determine the magnitude of the resulting forces applied to the nails for the given locations.
The magnitude of the resulting forces applied to the nails if they are located at A and B is 64.44 N, at B and C is 120.83 N and at A and C is 56.86 N.
We know that,
C = F d
where,
C = Couple
F = Magnitude of resulting forces
d = Distance between two points
Given that,
C = 29 N m
[tex]d_{AB}[/tex] = 450 mm = 0.45 m
[tex]d_{BC}[/tex] = 240 mm = 0.24 m
F = C / d
The magnitude of the resulting forces applied to the nails if they are located at A and B is
F = 29 / [tex]d_{AB}[/tex] = 29 / 0.45
F = 64.44 N
The magnitude of the resulting forces applied to the nails if they are located at B and C is
F = 29 / [tex]d_{BC}[/tex] = 29 / 0.24
F = 120.83 N
The magnitude of the resulting forces applied to the nails if they are located at A and C is
F = 29 / [tex]d_{AC}[/tex]
[tex]d_{BC}[/tex] = √ ( [tex]d_{AB}[/tex] )² + ( [tex]d_{BC}[/tex] )²
[tex]d_{BC}[/tex] = √ ( 0.45² + 0.24² )
[tex]d_{BC}[/tex] = 0.51 m
F = 29 / 0.51
F = 56.86 N
A Couple is two parallel forces of equal magnitude acting in opposite direction.
Therefore, the magnitude of the resulting forces applied to the nails if they are located at
A and B is 64.44 NB and C is 120.83 N A and C is 56.86 NTo know more about couples
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a car sitting at a red light begins to accelerate at 2.0 m/s 2 m/s2 when the light turns green. it continues with this acceleration until it reaches a speed of 20 m/sm/s . it then travels at this speed for another few minutes. how far does the car travel in the first 34 ss after the light changes to green?
The car travels a distance of 820m in the first 34s after the light changes to green.
Acceleration, a = 2ms⁻²
Initial velocity, u = 0 ms⁻¹ (Since the car start from rest)
Final velocity, v = 20 ms⁻¹
From first equation of motion,
v - u = at
20 - 0 = 2 × t
20 = 2t
t = 10s
From second equation of motion,
S = ut + ¹/₂ at²
Distance travelled during 10s:
S₁ = 0 × 10 + ¹/₂ × (10)²
S₁ = 100m
Distance travelled for the remaining 36s:
S₂ = v × t
S₂ = 20 × 36
S₂ = 720m
Total distance travelled:
S = S₁ + S₂
S = 100 + 720
S = 820m
Therefore, the car travels a distance of 820m in the first 34s after the light changes to green.
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