Question

a body is moving on a rough level road with a speed of 15m/a along a given direction.does any force needed to mentain this speed why

Answer 1

yes an external or internal force is required to maintain the speed because if there will be no force acting on the body , it's speed will reduce and will finally come to stop because of the force of friction

Answer 2

Answer:

Yes, a constant force is needed to maintain this speed. The force is needed to balance the force of friction acted on the body by road.

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