Question

A ball with a mass of 2.0 kg is dropped from a height of 1.5 m. The ball hits the floor and bounces back to a height of 1.1 m. Use energy conservation wherever possible to answer these questions. (a) What is the speed of the ball just before it reaches the floor initially? (b) What is the speed of the ball just after it leaves the floor? (c) How much work is done by the floor? (d) The coefficient of restitution of an object is defined to be the ratio of the rebound speed to the impact speed. Calculate the coefficient of restitution for the ball. (e) What is the impulse experienced by the ball while in contact with the floor? (f) If the ball is in contact with the floor for 5.0 ms, what is the average force exerted on the ball by the floor?

Answer #1

A 2.0-kg ball is dropped from a height of 5.0 meters. It hits
the ground and bounces upward. If it reaches a height of only 3.2
m, determine the magnitude of the work done by non-conservative
forces in this situation.

A 160 g ball is dropped from a height of 2.2 m , bounces on a
hard floor, and rebounds to a height of 1.1 m . The figure(Figure
1) shows the impulse received from the floor.
Part A
What maximum force does the floor exert on the ball?

1.
a tennis ball is dropped from a height of 2 m and it rebounds 95
cm. use g=10 m/s^2, and the tennis ball weights .058 kg.
a) find the change of momentum when the ball is at a height of
1.5 m downward and at 0.5 m downward. which i got -3.14 kg m/s for
the 1.5 m, and -0.18 kg m/s, and then what is the impulse exerted
on the object during that change of momentum?
b) compute...

A 2.0kg rubber ball is dropped from a height of 1.0m above the
floor.
a. Using energy (not
equations of motion), what is the ball’s speed just before it hits
the floor?
b. If it then bounces back to a height of 0.70m, what is the
speed of the ball, just as it leaves the ground? Again, use energy
rather than equations of motion.
c. How much kinetic
energy is lost?

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 2.33 kg ball is
dropped from a height of 3 m. The ball then bounces back
upward a distance of 2.2 m. How much energy was lost in the
collision with the ground?
50.2 J
18.3 J
68.5 J
118.7 J
A 2.33 kg ball is
dropped from a height of 3 m. The ball then bounces back
upward a distance of 2.2 m. How much momentum does the ball have
immediately after bouncing off the ground?
5.13 kg m/s
21.6...

A ball with mass of 0.050 kg is dropped from a height
of h1 = 1 .5 m. It collides with the floor,
then bounces up to a height of h2 = 1.0 m. The Collison
takes 0.015 s.
Use part e to Calculate impulse ( J) ? Write the formula first
.
Use part f to Calculate the average force acting ( F) on the
ball by the floor during the collision?
*Write the formula
Calculate the change in the...

A steel ball with mass 40.0 g is dropped from a height of 2.00 m
onto a horizontal steel slab. The ball rebounds to a height of 1.60
m.
(a) Calculate the impulse delivered to the ball during impact,
in N-m. Define upward as positive.
(b) If the ball is in contact with the slab for 2.00 ms, find
the average force on the ball during impact, in N. Define
upward as positive.

A rubber ball of mass m is dropped from a height h. If the ball
loses energy on each bounce so that its speed just after each
bounce is 90% of its speed just before each bounce, then Önd an
expression for the height the ball reaches after the 3rd bounce

A 1.5 kg ball is dropped from a height of 3 m above the ground
and upon striking the ground bounces up to a height of 2 m.
Ignoring air resistance, find the time it takes the ball to bounce
up to a height of 2 m after it is dropped.

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