You are sitting in a stopped bus. When the bus starts moving forward, you appear to move backward relative to the bus. Which statement best explains this observation?
The force of inertia on you balances the force from the motion of the bus.
Inertia prevents the force of the bus from acting on you.
The bus moves forward, while inertia keeps you in place.
The motion of the bus creates an unbalanced backward force on you.