Question

A man standing on a bus remains still when the bus is at rest. When the bus moves forward and then

Answer 1

This is an example of inertia - the body keeps it's energy because there is no force applied to it. When we try to stop it's motion, it resists. A man is not rigidly attached to the bus, so he keeps moving forward, at least until he hits the front window from inside. Answer is D.