Question

explain how force can change the state of rest or of motion

Answer 1

Force can cause Motion and Acceleration:

There are myriad of examples in real life of force resulting in motion. When you kick a stationary ball. You are applying force to it through your legs which causes the ball to start moving. This is not the only effect though, force can also cause an increase in motion if it is applied in the same direction in which the body is moving. For example, if you cycling and you’re already in motion, by pedalling some more you are effectively using force to increase the speed in which you are travelling. This is an example of force being used to speed up or cause acceleration. We should remember that the acceleration happens only as long as force is being applied. If the force is removed, the acceleration stops.

Answer 2

Hello friend
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This can be understood by following experiment:

Take a ball and place it on the floor. the ball will stay there until and unless we apply a force on the ball. this condition is the rest state of the ball. when we kick the ball, we are applying a force on the ball. this causes the ball to move . so , the applied force changed the state of rest of the ball.

Now, while the ball is moving on the floor, place your hand or leg against the ball. then the ball will again come to the state of rest. so, we can conclude that force can change the state of motion also

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Hope it will help u