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Q: force of 500N acts on a body through a distance of 20 meters. Calculate the work done by the force…
A: Given Force F = 500 N Displacement S = 20 m Work done = F S cosθ
Q: If you push against an immovable object, such as a brick wall, you may tire yourself out, but you…
A: When we apply some force (F) on an object and it gets displaced (d) then work done on the object is…
Q: Cite an example in which a force is exerted on an object without doing work on the object.
A: The work done will be zero when the applied force on an object is perpendicular to the displacement…
Q: A 380-kg piano slides 2.9m down a. 25 degree incline and is kept frim accelerating by a man who is…
A:
Q: The work done by kinetic friction can be. O Positive O Negative O zero Oany of the above
A:
Q: 1) A 200 N block is pushed up a frictionless, 30°, 3 m inclined plane by a force F parallel to the…
A: Weight of the block Wb=200 N and velocity at bottom of block u=0.5 m/s and velocity at top of the…
Q: In what direction relative to the direction of travel can a force act on a car (traveling on level…
A: The kinetic energy of any object with a mass m moving with a velocity v is given by KE=12mv2 Any net…
Q: a-) Determine the work a hiker must do on a 15.0-Kg backpack to carry it up a hill of height…
A: a)Work done by hiker w=mgh=15*9.81*10=1471.5J b)Work done by gravity W=-mgh=-15*9.81*10=1471.5J
Q: Cite an example wherein force exerted on a body does no work. Explain.
A: Work done is defined as the product of force, displacement and cosine of angle between force and…
Q: Rank the following objects in order of their kinetic energy, from least to greatest. (i) A 2.0 kg…
A: K.Ef=K.Ef+W=12mv2+W (i) K.E1=12mv2=12252=25J (ii) K.E2=1210+30=30J (iii) K.E3=12142+20=28J (iv)…
Q: A block of mass M, which was initially stationary, is lowered downwards using a rope with an…
A: The free-body diagram for the problem is shown in the figure: Applying Newton's second law…
Q: As a simple pendulum swings back and forth, the forces acting on the suspended object are the…
A: In this question, we have been asked that which of the forces act on pendulum and which of these…
Q: (a) If force and displacement have the same direction, the work done is ________________. (b) If…
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Q: A physics textbook is placed on an inclined slope with an adjustable angle a. The coefficients of…
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Q: A small 25g toy rocket is launched straight up from the ground at 144 km/h (a) What is the kinetic…
A: Given : m = 25g = 0.025 kg v = 144 km/h = 40 m/s h = 220 m
Q: The crate of mass m= 31 kg is at rest at A on the theta=7o incline. The coefficients of static and…
A: Given,
Q: A crate of mass 9.0 kg is pulled up a rough incline with an initial speed of 1.42 m/s. The pulling…
A: (b) Increase in internal energy due to friction Wfk=-fkd=-μkmgcosθd=-0.49.0 kg9.8m/s2cos20.6°4.92…
Q: (2) The combined force of lift and thrust on a model airplane is a constant F = (4i + 3j + 6k) N. a.…
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Q: *14. (III) A 17,000-kg jet takes off from an aircraft carrier via a catapult (Fig. 6–39a). The gases…
A: Work done on the jet by the gases expelled is determined by multiplying the force of the jet engine…
Q: If the net work done by external forces on a particle is zero, which of the following statements…
A: The work-energy theorem states that the net work done by the object will be equal to the change in…
Q: 16) A force F of strength 20N acts on an object of mass? kg as it moves a Distance of 4 meters. If F…
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Q: Determine the work done by the constant force. The locomotive of a freight train pulls its cars with…
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Q: A child sits on the shoulder of his father. (a). Is work done on the sitting child by his father?…
A: Answer:- (a) A child sits on the shoulder of his father. No work is done because We know that,…
Q: 1-) A box with a mass of 10 kg is pulled along a roughly inclined plane at an initial speed of 1.5 m…
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Q: -40 A can of sardines is made to move along an x axis from F= exp(-4x), with x in meters and Fin…
A: From the given the work done is,
Q: A 380-kg piano slides 2.9 m down a 25o incline and is kept from accelerating by a man who is pushing…
A:
Q: Calculate the work done on a 1500-kg elevator car by its cable to lift it 50.0 m up at constant…
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Q: A man returning from ice fishing trip pulls a sled with fish. Total mass of the sled and fish is…
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Give an example of an object that has three forces acting on it, and (1) accelerates, (2) moves at constant (nonzero) velocity, and (3) remains at rest. (ii) In terms of work done distinguish between conservative and non-conservative force.
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