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Physics
Grade-8
Easy
Question
Is this statement true or false? an external force is required to keep a body in motion
True
False
Hint:
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
The correct answer is: False
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.