Question

what do you mean by change in state of rest or motion?​

Answer 1

Answer:

Force is defined as a push or a pull that changes or tend to change the state of rest or uniform motion of an object or changes the direction or shape of an object. ... So whenever there is an interaction that happens between two objects there is a force that is acted upon each of the objects.

Answer 2

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Change of state :

The process of change from one state(form) to another state (form) either by absorption or rejection of heat at a constant temperature is called the Change of State.

Complete cycle of change of state :

On heating a solid changes to liquid and liquid on heating changes to vapours. On cooling vapours condense to Liquid, Liquids on cooling freeze to Solids. Some Solids on heating change to vapours. On rejection of heat vapours solidify.