A ball starts from rest down a smooth (frictionless) 45 degree inclined plane 10 m above the floor. How fast will it be going when it reaches the floor?

Answer 1

a solid ball, or hollow?

is it rolling? Without friction, it wont roll.

So I don't know enough to answer you?

Answer 2

just a ball (nothing else is given for this ball) the ball is at rest 10 m above the horizontal on a 45 degree smooth inclined plane. Vi= 0 m/s, height = 10 m, Vf =?