A man standing on a bus remains still when the bus is at rest. When the bus moves forward and then
slows down the man continues moving forward at the original speed. This is an example of the effect of
A. gravity.
B. velocity.
C. weight.
D. inertia.

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.

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A man standing on a bus remains still when the bus is at rest. When the bus moves forward and then slows down the man continues moving forward at the original speed. This is an example of the effect of A. gravity. B. velocity. C. weight. D. inertia.

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A man standing on a bus remains still when the bus is at rest. When the bus moves forward and then
slows down the man continues moving forward at the original speed. This is an example of the effect of
A. gravity.
B. velocity.
C. weight.
D. inertia.