Work
Work accomplishes a change in the position of a body against resistance.
Energy
Energy is the capacity for doing work — in other words, stored work.
Work and energy share the same unit, the foot-pound (ft-lbs): the work or energy needed to move a body 1 ft against a 1 lbs resistance.
Power
Power is the rate of doing work.
Power
P = WT
- P
- power
- W
- work
- T
- time
For a winch or hoist, power is line pull × line speed. See Horsepower for the formula in ft-lbs per minute.
Force
Force is the cause that changes, or tends to change, the motion of one body relative to another. Attraction, repulsion, push, pull, effort, thrust, resistance, load and pressure are all forces.