Question

Forces applied to a body brings a change in its state of motion if __________.

• A. they are unbalanced
• B. they are balanced
• C. they eliminate the cause
• D. the body is in rest only

Answer 1

The correct option is A they are unbalanced

A force does not always bring a change in the state of motion of an object. For instance, if you push the wall of a room with your hands, the wall does not move. If a balancing force is acting on the object, it experiences no change in motion. Application of unbalanced force(s) on the object results in change in state of motion. For a body in motion, unbalanced forces changes the speed and/or direction of the body.