Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest?

Braking Scenario:
– Inertia’s Role: Imagine you’re on a moving bus. You and the bus are moving at the same speed.
– Abrupt Braking: When the bus stops suddenly, it slows down, but due to your body’s inertia, you want to continue moving forward.
– Result: Your body momentarily maintains its forward motion, causing you to lean or lurch forward relative to the bus.

Acceleration Scenario:
– Inertia’s Influence: At the bus’s initial rest, you are stationary.
– Quick Acceleration: As the bus accelerates forward, your body resists this change in motion.
– Outcome: Your body lags behind the bus’s acceleration, resulting in you leaning or falling backward relative to the bus’s direction.

Conclusion:
This experience is due to inertia, which tends to keep your body in its initial state of motion. When the bus abruptly changes its motion, your body tends to stay in its initial state, causing the sensation of leaning or falling in the opposite direction.