The acceleration produced in a body by a force of given magnitude depends on —

1. size of the body
2. shape of the body
3. mass of the body
4. None of these

The S.I. unit of force is:

1. dyne
2. g cm s^-2
3. Newton
4. Joule

The force required to produce an acceleration of 5 ms^-2 in a body of mass 2 kg is:

1. 2.5 N
2. 20 N
3. 10 N
4. 25 N

According to Newton's second law of motion, the change in momentum takes place in a direction :

1. opposite to the direction of force applied
2. perpendicular to the direction of the force applied
3. similar to the direction of the force applied
4. none of these