Answer:
Moment is the product of force and its perpendicular distance from a point along its line of action.
The net moments on clockwise and anticlockwise is zero at a point.
The net force applied on a spanner handle is equal to the moment of the rotation
Answer: (Sorry, but I don't know how to calculate mass)
1. 15 N
2. 0.4921 (feet per second squared)
4. 150 N
5. 8.202 feet per second squared
The answer should be copper. hope this helps :D