(Answered) The cart shown starts from rest and rolls down the slope

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The cart shown starts from rest and rolls down the slope. For each wheel Ic = 0.8 ft-lb-s^2, weight 30 lb. and diameter 32 in. The body of the cart weighs 60 lb. Assuming no slipping and neglecting friction at the axles, determine the a) acceleration of the cart down the slope, b) minimum coefficient of friction required to assure no slipping.

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