Chapter 6 Quiz
1. A baseball was thrown from 1 m hill. Assume
that the ball had an initial velocity of 70 km/h
(19.44 m/s) at 40 degrees.
a. What was the initial velocity on x
b. What was the initial velocity on y
c. How long will it take for the ball to land
on the ground?
d. How far will the ball travel?
2. Pete throws a tennis ball horizontally from the
top of the 50 m building. Assume that the ball landed
100 m away from the building.
a. How long did it take for the ball to reach
b. What was the initial velocity on x
c. What was the velocity of the ball when it
hit the ground?
3. Michael is competing in the long jump. Assume
that his total velocity (velocity of x and y
directions combined) right before he jumped was 6.5
a. If he jumped at an angle of 35 degrees,
what would his vertical velocity be?
b. How long will he stay in the air then?
4. A 1300 kg car takes 35 s to travel around a
circular road that has a radius of 40 m.
a. What is the velocity of the car?
b. What is the acceleration of the car?
c. How big should the force of friction be to
maintain this acceleration?
d. How big should the coefficient of the force
of friction be?
5. A coin is placed on a stereo record, which
takes 3 seconds to make a complete revolution. Assume
that the coin has a velocity of 5 m/s.
a. What is the acceleration of the coin?
b. What is the distance from the center of the
stereo record to the coin?
c. How big is the coefficient of the force of
friction between the stereo and the coin?
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