What will happen to an object in motion if an unbalanced force does not act on it?

Responses

it will slow down eventually
it will slow down eventually

it will continue moving at the same velocity forever
it will continue moving at the same velocity forever

its speed and/or direction will change
its speed and/or direction will change

it will stop
it will stop

According to Newton's first law of motion (also known as the law of inertia), an object in motion will continue moving at the same velocity (speed and direction) forever, unless acted upon by an unbalanced force. This means that if there are no unbalanced forces (such as friction, air resistance, or other forces) acting on the object, it will not slow down, change direction, or stop; it will keep moving at a constant velocity.

So the correct response is:

it will continue moving at the same velocity forever