A block of mass m is sliding along a level surface with an, Ask an Expert

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A block of mass M is sliding along a level surface with an initial speed of 9m/s. 3s later its speed is 4m/s.

a) Find its acceleration, assuming it is constant.

b) Find the coefficient of friction of the surface. (Assume friction is the only horizontal force. Show a force diagram and write down he equations for Newton's second law.)

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