Important Topics
1. Moment of force, how measured.
2. Parallel forces.
3. The two laws of parallel forces.
4. The couple.
Exercises
1. Show by diagram how to arrange a three-horse evener so that each horse must take one-third of the load.
2. Two boys support a 10-ft. pole on their shoulders with a 40-lb. string of fish supported from it 4 ft. from the front boy. What load does each boy carry? Work by principle of moments.
3. If two horses draw a load exerting a combined pull of 300 lbs., what force must each exert if one is 28 in. and the other is 32 in. from the point of attachment of the evener to the load?