Dear student,
1. If the effect of the body is to turn it clockwise the moment of force is called clockwise moment and it is taken negative.Anticlockwise moment: If the force has tendency to turn or rotate a body in anticlockwise direction, the moment of force is called anticlockwise moment
2. Pressure = Force/ Area
It depends on the force applied and and the area on which the force is applied.
Regards