February 23, 2017

Homework Help: physics

Posted by emath on Tuesday, March 2, 2010 at 10:04pm.

A tennis ball is a hollow sphere with a thin wall. It is set rolling without slipping at 4.24 m/s on a horizontal section of a track. It rolls around the inside of a vertical circular loop 90.0 cm in diameter and finally leaves the track at a point 19.0 cm below the horizontal section.
(a) Find the speed of the ball at the top of the loop.

(b) Find its speed as it leaves the track.

I tried using energy conservation but I keep getting the wrong answer

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