Question

this physical quantity is the measure of rapidity of a motion.​

Answer 1

The main quantity that measures the motion of a body is momentum. An object's momentum increases with the object's mass and with its velocity. The total momentum of all objects in an isolated system (one not affected by external forces) does not change with time, as described by the law of conservation of momentum.

Answer 2

Answer:

One of the ways of measuring the rate of motion of an object is to find out the distance traveled by the object in unit time. As the distance is to displacement, so speed is to velocity: the crucial difference between the two is that speed is a scalar and velocity is a vector quantity.

Explanation:

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