Sun September 02, 2012 By:

Why do the passengers in a bus tend to fall backward when it starts suddenly?

Expert Reply
Sun September 02, 2012
 each body has an inertia of its own, i.e. an ability to resist any change in its state of motion.
SO in a bus when it is at rest and as it moves, the lower part of bodies attached to the bus seat starts  moving but the upper part resists the motion and thats why we fall backwards
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