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​A hollow 10 kg ball with a radius of 0.6 m rolls down a hill which...

​A hollow 10 kg ball with a radius of 0.6 m rolls down a hill which is 50 m high and 100 m long. ​How fast is the ball going at the bottom of the hill if it starts from rest? Moment of inertia for a ​hollow ball: 1 = (2mr2)/3

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