Author Question: A 4.50-kg wheel that is 34.5 cm in diameter rotates through an angle of 13.8 rad as it slows down ... (Read 45 times)

RRMR · **on:** Jul 29, 2018

A 4.50-kg wheel that is 34.5 cm in diameter rotates through an angle of 13.8 rad as it slows down uniformly from 22.0 rad/s to 13.5 rad/s. What is the magnitude of the angular acceleration of the wheel?

A) 0.616 rad/s2
B) 5.45 rad/s2
C) 111 rad/s2
D) 22.5 rad/s2
E) 10.9 rad/s2

Question 2

An astronaut stands by the rim of a crater on the moon, where the acceleration of gravity is 1.62 m/s2.

To determine the depth of the crater, she drops a rock and measures the time it takes for it to hit the bottom. If the time is 6.3 s, what is the depth of the crater?
A) 10 m
B) 14 m
C) 26 m
D) 32 m
E) 38 m