Question

1. Guess and write when the bus is rest begins to move suddenly the person standing in the bus falls backward. Why?
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Answer 1

Answer:

When the bus is at rest and starts suddenly,then due to inertia the person sitting inside the bus is about to fall backwards. This happens because as the bus moving the lower part of his body starts moving with the bus but the upper part resist the motion and try to remain at rest

Answer 2

Answer:

We are standing in a bus and bus begins to move suddenly. We tend to fall backwards. This is because the sudden start of the bus brings motion to the bus as well as to our feet in contact with the floor of the bus. But the rest of our body opposes this motion because of its inertia.