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# When is a body said to be in motion?A. A body is said to be in motion when its position continuously changes with respect to timeB. A body is said to be in motion when its position doesn’t change with respect to timeC. A body is said to be in motion when its average speed is zero.D. All the above.

Last updated date: 13th Jun 2024
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Hint: Velocity is a vector quantity while speed is scalar quantity. Velocity depends on direction. Speed is independent of direction. Speed is defined as distance upon time in no particular direction. Velocity is the rate of change of distance in a particular direction.

A body is said to be in motion when its position continuously changes with respect to time.
When the average speed is zero then the body is not in motion. Also when the position doesn’t change with time, the body is said to be at rest.

So, the correct answer is “Option A”.