Question

Define ...
•rest
•reference body
•motion​

Answer 1

Explanation:

Rest - a body is said to be at rest, if it does not change its position with respect to its surrounding with time.

reference point

motion is observed when an object changes its position. To help that, a body of reference is given .

Motion - a body is said to be at motion, if it changes its position with time.

Answer 2

1. To rest means to relax into something and let it support you. Rest yourself on the couch for a while, if you're tired. The word rest comes from the German rasta meaning "league of miles." If you walked that far, you'd need a good rest too.

2. motion is observed when an object changes its position. To help that, a body of reference is given . eg. a car started from that tree and travelled x km. so tree is the reference body here.

3.movement or a way of moving