To maintain a body in uniform motion, we need to apply an external force to counter the frictional force
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The correct option is B False The Newton's first law of motion states that there will be no change in state of motion of body unless a net external force is applied. The statement is false, because frictional force might not be the only force acting on the body. So the external force should counter all the forces including frictional force to keep the body moving in a uniform motion.