Question

force is an entity which when applied on a body changes or tends to change a body's
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Answer 1

Answer:

Force, in mechanics, any action that tends to maintain or alter the motion of a body or to distort it. ... According to Newton's first principle, a body that is at rest or moving at a uniform rate in a straight line will remain in that state until some force is applied to it

Answer 2

Answer:

Force, in mechanics, any action that tends to maintain or alter the motion of a body or to distort it. ... The second law says that when an external force acts on a body, it produces an acceleration (change in velocity) of the body in the direction of the force.