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

10⁷ dyne cm is equal to …………… Nm.

1. 1
2. 10
3. 100
4. 1000

The direction of rotation of a pivoted body can be changed by changing:

1. the direction of force
2. the point of application of force
3. both the direction of force and the point of application of force
4. the magnitude of force

A couple is formed when …………… are not acting along the same line

1. two unequal and parallel forces
2. two equal and parallel forces
3. two equal and opposite parallel forces
4. two unequal and opposite parallel forces