A ball is released from rest on a no-slip surface, as shown in ...

[jCorn1234]

A ball is released from rest on a no-slip surface, as shown in the figure. After reaching its lowest point, the ball begins to rise again, this time on a frictionless surface as shown in the figure.
 
  When the ball reaches its maximum height on the frictionless surface, it is
 
  A) at a greater height than when it was released.
  B) at a lesser height than when it was released.
  C) at the same height as when it was released.
  D) It is impossible to tell without knowing the mass of the ball.
  E) It is impossible to tell without knowing the radius of the ball.

Question 2

A solid sphere, solid cylinder, and a hollow pipe all have equal masses and radii and are of uniform density. If the three are released simultaneously at the top of an inclined plane and roll without slipping, which one will reach the bottom first?
 
  A) solid sphere
  B) hollow pipe
  C) solid cylinder
  D) They all reach the bottom at the same time.

[komodo7]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: A

[jCorn1234]

Gracias!

[bbburns21]

Excellent