Work is done when a force moves an object in the direction of the force.

Work: W = F × D × cos𝜃

where w = work, f =force, d = Distance, θ = Angle between force and motion direction.

1. Positive work (force and motion in the same direction).


2. Negative work (force opposes motion).

Energy is the ability to do work or cause changes.

1. Kinetic energy (due to motion).


2. Potential energy (due to position).


3. Heat energy.


4. Chemical energy.


5. Electrical energy.

Power is the rate at which work is done or energy is used.

formula for power

power: P = WT

Where p = power, w =work, t= time.

1. Mechanical power.


2. Electrical power.


3. Hydraulic power.