When a body does not change its position with regard to time, it is said to be in motion. When a body shifts in relation to time, it is said to be in motion. Distance is a unit of measurement for length or distance. A unit can be used to measure length. A comparison of an unknown quantity with a known quantity is called a unit. To facilitate calculations and analysis globally, a single standard or convention must be established. To learn more about the subject, look through this PPT.

Dency Varghese

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