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Tutorial C5 - Q8

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A constant horizontal force of 2.0 x 103 N is acting on an object of mass 5.0 x 103 kg on a horizontal surface. The initial velocity of the object is 4.0 ms-1. Calculate the velocity of the object after it has moved 300 m
(i) if the horizontal surface is smooth and
(ii) if the horizontal surface is rough and exerts an opposing force of 400 N
to the motion of the object.
(i) if the horizontal surface is smooth and
(ii) if the horizontal surface is rough and exerts an opposing force of 400 N
to the motion of the object.