Review Questions for Test
Example Kinematics Questions
1. Nicole throws a ball straight up. Chad watches the ball from a window 5.10 m above the point
where Nicole released it. The ball passes Chad on the way up, and it has a speed of 11.0 m/s as it
passes him on the way back down. How fast did Nicole throw the ball?
2. At NASA the astronauts had to train on a centrifuge to become accustom to the high
accelerations they would experience in space. If the arm of the centrifuge is 10 m long and has
a constant angular acceleration of 1.2 rad/s2, what is the tangential velocity after exactly 4
seconds? What is the magnitude of the total linear acceleration experienced by the astronaut?
3. A rock is tossed off the top of a cliff of height 22 m. Its initial speed is 29.3 m/s, and the launch
angle is 29.9 with respect to the horizontal. How far from the edge of the cliff does the rock
land?
4. A record player spins most records at 33 rpm. After 15 min the record has finished playing.
Instead of stopping the record player you pull off the old record and decide to drop a new
record onto the turn table. You notice that that record makes a quarter turn before no longer
slipping. What was the angular acceleration acting on the record? Assuming the angular
acceleration is constant.
Example Force Questions
5. A piano mover raises a 100 kg piano at a constant rate using a frictionless pulley system, as
shown below. With what force is the mover pulling down on the rope?
6. A 975-kg car accelerates from rest to 26.7 m/s in a distance of 120 m. What is the magnitude of
the average net force acting on the car?
7. A 4000 kg truck is parked on a 15° slope. How big is the friction force on the truck? What is the
coefficient of static friction?
8. The figure shows the force acting on a 2.0 kg object as it moves along the x-axis. The
object is at rest at the origin at t=0s. What are its acceleration and velocity at t=6s?