Which of the following situations involves the Newton's 2nd law of motion?
a) a force can stop a lighter vehicle as well as a heavier vehicle which are moving
b) a force can accelerate a lighter vehicle more easily than a heavier vehicle that is moving
c) a force exerted by a lighter vehicle on collision with a heavier vehicle results in both the vehicles coming to a halt
d) force exerted by the escaping air from a balloon in the downward direction makes the balloon to go upwards