Explain the following:

After alighting from a moving bus, one has to run for some distance in the direction of bus in order to avoid falling.

Explain the following:

Dust particles are removed from a carpet by beating it.

The force needed to stop a moving body in a definite time depends on:

1. mass of the body
2. velocity of the body
3. both (a) and (b)
4. none of these

The linear momentum of a body of mass m moving with velocity v is —

1. v/m
2. m/v
3. mv
4. 1/mv