The unit of pressure is:

1. N x m
2. kgf
3. N m^-2
4. kgf m²

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 thrust is:

1. kgf
2. kg
3. g
4. m s^-1