A 4.50-kg wheel that is 34.5 cm in diameter rotates through an ...

[RRMR]

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

[cam1229]

Answer to Question 1

E

Answer to Question 2

D

[RRMR]

Gracias!

[brbarasa]

Excellent