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A hollow sphere rolls up a 30 degree incline with an initial velocity of v_i , has radius of r, and a mass of m.

A hollow sphere rolls up a 30 degree incline with an initial velocity of v_i , has radius of r, and a mass of m.

Part a) Derive an expression for the magnitude of acceleration(a) and its direction

Part b) Derive the magnitude and direction of friction(F_friction)

Feel free to plug in numbers for the givens. Thanks a lot.

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