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## Homework Statement

A sphere of radius r_0 = 24.0 cm and mass m = 1.20{\rm{ kg}} starts from rest and rolls without slipping down a 37.0^\circ incline that is 15.0 m long.

Calculate its translational speed when it reaches the bottom.

## Homework Equations

ke=1/2mv^2

pe=mgh

## The Attempt at a Solution

Since PE=KE , i put the two equations together to form mgh=1/2mv^2. Canceling the m's we get gh=1/2v^2. Using triganomity i find that the height is 9.027m. Then pluging in all the values the answer comes out to be 13.3m/s. This isnt the right answer.