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

Answer 1

because the bus still moving its uniform motion suddenly the bus applies brakes the bus stop at rest so we fall forward due to inertia and the bus was its rest suddenly the bus starts its accelerates so we fall backwards due to inertia

Answer 2

When the bus brakes to a stop, your body tends to stay in motion due to inertia, causing you to lean forward. When the bus accelerates from rest, your body also tends to stay at rest due to inertia, making you lean back. These movements are a result of Newton's First Law of Motion.

Answer 3

It's a demonstration of the property of matter called inertia; i.e. as stated in Newton's First Law of Motion: an object at rest tends to remain at rest and an object in motion tends to remain in motion unless acted on by an outside force.

In actuality the person isn't really falling backward. What's happening is that different parts of their body are all moving forward - but at different rates with respect to the ground outside of the bus.

When the bus starts to move its speed increases, i.e. it accelerates. The person's feet are held in place by friction between their shoes and the bus floor so they move in tandem with that acceleration. However inertia causes their upper body to try to stay where it was rather than moving forward at the same rate as their feet. Because our bodies are somewhat flexible the net result is that the person's feet move forward faster than their upper body. In effect the bus is pulling their feet out from under them in a forward direction.

The reason a person on the bus thinks they're falling backwards is that they're determining their position by looking at the bus itself. If the bus is moving forward faster than their chest and head, their upper body is moving backwards relative to the position of the bus (and their feet!) On the other hand, someone standing on solid ground outside of the bus would see both the bus and the person move forward relative to the ground, but the person's upper body would move more slowly than the bus.

A person sitting on an accelerating bus experiences similar forces, but the seat pushes their upper body forward at the same rate as their feet and prevents them from losing their balance.

Answer 4

Because of inertia - a tendency of objects (your body, in this case) to maintain their velocity.

Answer 5

Inertia.