Question

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

Answer 1

Due to inertia of rest

Answer 2

ANSWER:

The 'stationary bus' suddenly speeds up passengers are thrown in the 'backward direction'. This happens due to Newton’s first law of Motion.

EXPLANATION:

• The concept involved here is called inertia of rest.  
• As the bus starts the 'lower parts of the body' is in contact with bus moves along with the bus, whereas upper part is still in the state of rest.
• As the result the passenger just are thrown backward direction, they don’t fall down.