The correct expression for force is:

1. $\vec{F} = m\vec{a}$(mass m is constant)
2. $\vec{F} = m\vec{v}$
3. $\vec{F} = mv$
4. $F = mp$

The motion of a door when a force is applied on its handle is:

1. rotational motion
2. linear motion
3. angular motion
4. zig-zag motion

The moment of a force about a given axis depends on:

1. only on the magnitude of force
2. only on the perpendicular distance of force from the axis
3. neither the force nor the perpendicular distance of force from the axis
4. both, the force and its perpendicular distance from the axis.

For producing the maximum turning effect on a body by a given force, the perpendicular distance of the line of force from the axis of rotation should be :

1. minimum
2. it does not matter
3. maximum
4. zero