There are two types of forces X and Y. The forces belonging to type X can produce motion in a stationary object but cannot change the shape of the object. On the other hand, forces belonging to type Y cannot produce motion in a stationary object but can change the shape of the object. What is the general name of the forces such as (a) X, and (b) Y?

(a) Unbalanced forces as these forces are not opposite in direction and equal in size always cause a change in motion.

(b) Balanced forces as balanced forces can cause an object to stay at rest or at constant velocity but don't change the motion of the object rather may change the shape.


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