A system can have a nonzero velocity while the net external force on it is zero. Describe such a situation.
Solution to 9CQ
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We need to state a situation where the system has a non zero velocity but the net external force is zero.
The net force on a body could be zero if,
(a)The body is non accelerating
(b)If there are two equal and opposite forces
(c)If the body is in constant velocity and there are no external forces acting on it.