Author Question: An object is dropped from a height. Once it is moving, which of the following statements is true, at ... (Read 79 times)

JGIBBSON · **on:** Jul 28, 2018

An object is dropped from a height. Once it is moving, which of the following statements is true, at least at one point?
a. Its velocity is more than its acceleration.
b. Its velocity is less than its acceleration.
c. Its velocity is the same as its acceleration.
d. Its velocity is never equal to its acceleration.

Question 2

A 50-g ball traveling at 25.0 m/s is bounced off a brick wall and rebounds at 20.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.50 ms, what is the magnitude of the average acceleration of the ball during this time interval?
a. 714 m/s2
c. 6430 m/s2
b. 1430 m/s2
d. 12,900 m/s2