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A basketball of mass 0.0400 kg is dropped from a height of 5.00 m to the
ground and bounces back to a height of 3.00 m.
a. On its way down, how much potential energy does the ball lose?
b. On its way back, how much potential energy does the ball regain
How much potential energy does a car gain if a crane lifts the car with a mass
of 1,500 kg and 20 m straight up?
How much potential energy does a car gain if a crane lifts the car with a mass
of 1,500 kg and 20 m straight up?
.A distance of 0.002 m separates two objects of equal mass. If the gravitational
force between them is 0.0104 N, find the mass of each object.
The moon has a mass of 7.34 × 1022 kg and a radius of 1.74 × 106 meters. If
you have a mass of 66 kg, how strong is the force between you and the moon?
A motor exerts torque in a carousel for it to attain a speed of 2.5 rev/s starting
from rest in 3.5 s. Find the work done by the motor if the carousel has a radius
of 27 m and a mass of 1.75 X 105 kg. Consider the carousel to be a thin-walled
cylinder rotating about its center
A teacher sits on a rotating stool to demonstrate the conservation of angular
momentum. With her arms outstretched, she rotates at 2.25 rev/s. When the
teacher’s arms are tucked in close to her chest, she rotates at 4.50 rev/s. what
is the ratio of her moment of inertia with outstretched arms to the moment of
inertia with arms tucked in close to her chest?
Find the Torque about the rotation produced by constant force of
(6 + 8 − 10 ) 𝑁 on a particle situated at (3 − 4 ) 𝑚.
Lynne jogs daily around a circular track of diameter 25 m for a total distance of
942 m in 5.0 min. (a) How many times did Lynne jog around the track? (b) What
is Lynne’s average angular speed in radians/s?
Car A of mass of 2000 kg moving at 72 km/h. east try to overtake car B of mass
1250 kg moving at 60 km/h, east. Car A collides with car B. The car stick
together after the collision. Find their velocity after collision. (It should be in
m/s).
