Physics

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1. A hollow sphere and a solid sphere roll without slipping down two different ramps. They start at different heights. The speed and kinetic energy of each sphere is the same when they reach the bottom of their ramp. If the hollow sphere has mass 3.25 kg, what is the mass of the solid sphere?

Ans. is 3.87

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    I just don't know how to get to this answer ?? :(

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