Question

An object moves with a uniform velocity when________

Answer 1

1. According to Newton's first law of motion, every object continues its state of rest or uniform motion in a straight path until an external force acts on it.
2. Therefore, in order to change the velocity of a moving object, a net external force should act on it.
3. We know that the magnitude of the force is given by $F=m\times a$
4. The magnitude of acceleration, $a$ is equal to zero for an object in uniform motion. Hence, $F=m\times 0=0$
5. Hence, we can conclude the given statement as ‘an object moves with a uniform velocity when no net external force is acting on it'.