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

Newton's first law of motion defines force :

1. quantitatively
2. qualitatively
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

Linear momentum is a :

1. scalar quantity
2. vector quantity
3. directionless quantity
4. none of these