A uniform solid sphere has a moment of inertia I about an axis ...

[cool]

A uniform solid sphere has a moment of inertia I about an axis tangent to its surface. What is the moment of inertia of this sphere about an axis through its center?
 
  A) 1/7 I
  B) 2/7 I
  C) 2/5 I
  D) 3/5 I
  E) 7/5 I

Question 2

A machinist turns the power on to a grinding wheel, which is at rest at time t = 0.00 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of
 
  The wheel is run at that angular velocity for 37 s and then power is shut off. The wheel decelerates uniformly at until the wheel stops. In this situation, the time interval of angular deceleration (slowing down) is closest to:
  A) 17 s
  B) 15 s
  C) 19 s
  D) 21 s
  E) 23 s

[rosiehomeworddo]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: A

[cool]

Excellent

[abro1885]

Gracias!