Motion and Rest Definition

Before we talk about definition on motion and rest let's try to Imagine ourself sitting in a seat while travelling in a moving train. We observe no change in position with respect to the window. There is change of scene when we view through the window. The change of scene indicates that the train is moving.

An object is said to be in motion if it changes its position with respect to its surroundings in a given time.

We know that the window in the cabin is at rest i.e., its position with respect to the walls of the cabin does not change with time.

An object is said to be at rest if it does not change its position with respect to its surroundings.

Have you watched the night sky? We have observed that the position of stars and planets change while you remain stationary. In reality the earth is moving too. Thus, an object which appears to be at rest, may actually be in motion. Therefore, motion and rest are relative terms. To describe the motion of an object we have to specify how its position changes with respect to a stationary object. This is called the frame of reference.

Definition for Motion -

Motion is a state, which indicates change of position. Surprisingly, everything in this world is constantly moving and nothing is stationary. The apparent state of rest, as we shall learn, is a notional experience confined to a particular system of reference.

A building, for example, is at rest in Earth’s reference, but it is a moving body for other moving systems like train, motor, airplane, moon, sun etc

Definition for Rest -

Rest is the term used for time off without any action between sets. Ex. 3 sets for 12 reps means you would complete a movement 12 times then take a rest of 1:30-6 minutes (depending on your goals) then start over for a total of 3 times.

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