S.I. unit of moment of force is:

1. N
2. N cm
3. kgf m
4. N m

To obtain a given moment of force for turning a body, the force needed can be decreased by:

1. applying the force at the pivoted point.
2. applying the force very close to the pivoted point.
3. applying the force farthest from the pivoted point.
4. none of the above.

The unit of pressure is:

1. N x m
2. kgf
3. N m^-2
4. kgf m²