Question

A
ball of mass 5.93 kg is released from rest at height 7.62 m above
the floor. It falls, hits the ground, and rebounds to height 3.2 m
above the floor. Assume none of the losses are due to air friction.
Find the work done against friction, in J, on the ball during the
contact with the ground

Answer #1

A
ball of mass 2.25 kg is released from rest at height 5.29 m above
the floor. It falls, hits the ground, and rebounds to height 3.19 m
above the floor. Assume none of the losses are due to air friction.
Find the impulse, in N-s, exerted by the floor on the ball. The
sign of your answer will give the direction of the impulse.

A rubber ball of mass 0.175 kg is released from rest from a
height of 1.25 m. It rebounds from the floor to reach a height of
0.630 m. What impulse was applied to the ball by the floor? (You
may safely ignore air resistance. Enter the magnitude in kg ·
m/s)

A stone 0.44 kg mass is released from rest from a height of 29.4
m above the ground. Ignoring air resistance and letting the ground
be the zero potential energy level,
Determine the final kinetic energy of the stone using energy
conservation principle only, not as a free fall.
Determine the work done on the stone by gravity.

A ball falls from height of 20.0 m, hits the floor, and rebounds
vertically upward to height of 15.5 m. Assume that
mball = 0.335 kg.
(a) What is the impulse (in kg · m/s) delivered to the ball by
the floor?
b) If the ball is in contact with the floor for 0.0400 seconds,
what is the average force (in N) the floor exerts on the ball?

After falling from rest from a height of 27 m, a 0.46 kg ball
rebounds upward, reaching a height of 17 m. If the contact between
ball and ground lasted 2.1 ms, what average force was exerted on
the ball?

A ball of mass m = 1.60 kg is released from rest at a height h =
77.0 cm above a light vertical spring of force constant k as in
Figure [a] shown below. The ball strikes the top of the spring and
compresses it a distance d = 8.10 cm as in Figure [b] shown below.
Neglecting any energy losses during the collision, find the
following.
(a) Find the speed of the ball just as it touches the
spring....

A 4.0 kg mass starting at rest is dropped from a height of 120 m
above the surface of the Earth. As it falls it experiences an air
resistance of 13 N. Just before it strikes the ground, determine
the change in potential energy ΔU, the work done by the air W, the
final kinetic energy Kf, and its final speed vf

A 4.0 kg mass starting at rest is dropped from a height of 120 m
above the surface of the Earth. As it falls it
experiences an air resistance of 13 N. Just before it
strikes the ground, determine the change in potential energy ΔU,
the work done by the air W, the final kinetic energy Kf,
and its final speed vf.

After falling from rest from a height of 33 m, a 0.60-kg ball
rebounds upward, reaching a height of 23 m. If the contact between
ball and ground lasted 2.3 ms, what average force was exerted on
the ball? (Enter the magnitude.)
N

a
ball of mass 0.175kg is dropped from rest from a height of 1.25m.
it rebounds from the floor to reach a height of 0.825m. what
impulse was given to the ball by the floor? magnitude______
kg

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