Question

During a rockslide, a 700kg rock slides from rest down a hillside
that is 740m along the slope and 260m high. The coefficient of
kinetic friction between the rock and the hill surface is 0.21. (a)
If the gravitational potential energy U of the rock-earth system is
zero at the bottom of the hill, what is the value of U just before
the slide? (b) How much energy is transferred to thermal energy
during the slide? (c) What is the kinetic energy of the rock as it
reaches the bottom of the hill? (d) What is its speed then?

Answer #1

During a rockslide, a 360 kg rock slides from rest down a
hillside that is 500 m along the slope and 250 m high. The
coefficient of kinetic friction between the rock and the hill
surface is 0.30. (a) If the gravitational potential energy U of the
rock-Earth system is zero at the bottom of the hill, what is the
value of U just before the slide? (b) How much energy is
transferred to thermal energy during the slide? (c)...

A child whose weight is 190N slides down a playground slide that
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a) What is the height of the slide?
b) What is the change in gravitational potential energy of the
child?
c) Draw the free-body diagram of the child
d) Calculate the frictional force on the child
e) How much energy...

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a. What is the gravitational potential energy of the bear at the
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b.What is the bear’s kinetic energy at the bottom?
c. Determine the work done by friction, by
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A block (4 kg) starts from rest and slides down
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then slides a horizontal distance of 1 m on a
rough surface with kinetic coefficient of friction
μk = 0.5. Next, it slides back up
another frictionless ramp #2.
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= J
Tries 0/3
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(a) How much energy is transferred to thermal
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A student of mass 65.4 kg, starting at rest, slides down a slide
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horizontal. If the coefficient of kinetic friction between the
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HINT
(a)
the force of kinetic friction (in N)
N
(b)
the acceleration (in...

a 24kg sled slides down a hillside with a 32 incline the
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