Question

if a stationary bus suddenly speed up passenger are out in the backward direction

Answer 1

Hey mate ^_^

This is because our body is initially at rest but when bus starts moving our feet which are in contact with the bus also tend to move forward, but our body shows inability to move due to inertia and as a result it falls back.

#Be Brainly♥️

Answer 2

If a stationary bus suddenly speed up passenger get backward because he was at rest with respect to bus