A man getting down from a running bus falls forward :

Question

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Answer 1

Inertia is the tendency of an object to resist any change in their state of motion. When a person alights from the bus, his body would try to continue moving in the direction the bus was moving due to inertia. But as soon as both the feet touches the ground, the lower part of the body comes to rest while the upper part gets carried away under the effect of inertia resulting into his forward fall.

Answer 2

Inertia is the tendency of an object to resist any change in their state of motion. When a person alights from the bus, his body would try to continue moving in the direction the bus was moving due to inertia. But as soon as both the feet touches the ground, the lower part of the body comes to rest while the upper part gets carried away under the effect of inertia resulting into his forward fall.

A man getting down from a running bus falls forward :

as the forward movement of bus tries to pull the man forward

due to inertia the upper part of the body moves in the forward direction while feet come to the rest as soon as they touch the road

as he leans forward as a matter of habit

due to the combination effect of all the three factors stated in $(A), (B)$ and $(C)$

A block of metal is lying on the floor of a bus. The maximum acceleration which can be given to the bus so that the block may remain at rest, will be:

If net force on a rigid body is zero, it is either at rest or moving with a constant linear velocity . Nothing else can happen.

Constant velocity means linear acceleration is zero.

In the motion of projectile the horizontal component of velocity remains constant

The force on the projectile is gravitational force which acts only in vertically downward direction

When a bus starts suddenly, a person standing in it falls backwards.

It is due to inertia of rest.

When a bus starts suddenly, a person standing in it falls backwards.

Revise with Concepts

Newton's First Law of Motion

First Law of Motion

A man getting down from a running bus falls forward :

as the forward movement of bus tries to pull the man forward

due to inertia the upper part of the body moves in the forward direction while feet come to the rest as soon as they touch the road

as he leans forward as a matter of habit

due to the combination effect of all the three factors stated in (A),(B) and (C)

A block of metal is lying on the floor of a bus. The maximum acceleration which can be given to the bus so that the block may remain at rest, will be:

If net force on a rigid body is zero, it is either at rest or moving with a constant linear velocity . Nothing else can happen.

Constant velocity means linear acceleration is zero.

In the motion of projectile the horizontal component of velocity remains constant

The force on the projectile is gravitational force which acts only in vertically downward direction

When a bus starts suddenly, a person standing in it falls backwards.

It is due to inertia of rest.

When a bus starts suddenly, a person standing in it falls backwards.

Revise with Concepts

Newton's First Law of Motion

First Law of Motion

due to the combination effect of all the three factors stated in $(A), (B)$ and $(C)$