Question

State whether true or false-
An object experiences the net zero external unbalance force. Is it possible for the object to be travelling with non-zero velocity?
A) True
B) False

Answer 1

Hint
According to Newton’s first law of motion an object will change its state of rest only when the net force acting on it is non-zero. Therefore, when a net non-zero force is act on the object then the velocity of that object will changed when net external force is zero, the object will continue its motion, if it is at rest and if it is moving with uniform velocity then it will continue that motion in the same velocity and in the same direction.

Complete Step by step solution
According to Newton’s first law of motion, every object continues its state of rest or uniform motion until an external force is applied on it.
Therefore, when net $F=0$ then $V=0$
According to Newton’s second law of motion, force $F$ is the product of mass $m$ and acceleration of an object.
Thus, $F = ma$
Here, acceleration is given as $a = \dfrac{{{v_f} - {v_i}}}{t}$
Where,and are the final and initial velocity of the object.
Now, when $F=0$ then $a = 0$
Therefore, ${v_f} = {v_i}$, It means if the object moves with the uniform velocity then it will continue to move with that velocity with no change in the direction even when it is acted by the unbalanced force which is zero.
Therefore, when an object experiences a net zero external unbalanced force, it is possible for the object to travel with uniform velocity.
Thus, (A) option is correct.

Note
If the balanced force is acting on the object then it will not change the velocity of the object it will only change the shape and size of the object. Imagine a scenario when you push the wall, we feel that we are applying the unbalanced force but still the wall is not changing its position, in this case the force which we applied is balanced by the internal forces of the wall.