Your car is coasting on level ground at 60 km/h and you apply the brakes until the car slows to 40 km/h. If you suddenly release the brakes now, the car tends to
A) decrease in speed if no other forces act.
B) continue moving at 40 km/h.
C) momentarily regain its higher initial speed.

Question

Quizplus · Accepted Answer

When you release the brakes, the car will continue moving at the speed it was going just before the brakes were released, which is 40 km/h, assuming no other forces act on it. This is due to Newton's first law of motion, which states that an object in motion stays in motion at a constant velocity unless acted upon by an external force.

Your Car Is Coasting on Level Ground at 60 Km/h