Question

if a stationary bus suddenly
speeds up, passengers are thrown in the backward direction

Answer 1

it is so because of inertia of rest.as bus is in rest so our lower part of body remains in rest but when bus starts our lower part comes in motion but upper part tends to remain in rest so the passengers are thrown in backward direction.

Answer 2

Answer:

if a stationary bus suddenly

speeds up, passengers are thrown in the backward direction =》

If a stationary bus suddenly speeds up, passengers are thrown in the backward direction. This is because initially the whole body of a passenger inside the bus was in the state of rest. But, when the bus suddenly starts or speeds up, the lower half of the passenger's body comes in motion in the forward direction but the upper half still remains at rest due to inertia of rest. Hence, the passengers are thrown backward when a stationary bus suddenly speeds up.