Force is a …………… quantity.

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

The property of an object by virtue of which it tends to retain its state of rest or of motion is called —

1. friction
2. inertia
3. force
4. mass

A force is needed to —

1. change the state of motion or state of rest of the body
2. keep the body in motion
3. keep the body stationary
4. keep the velocity of body constant

A tennis ball and a cricket ball, both are stationary. To start motion in them —

1. A less force is required for the cricket ball than for the tennis ball
2. A less force is required for the tennis ball than for the cricket ball
3. Same force is required for both the balls
4. Nothing can be said.