**Work:**

The work, W, done by a constant force on an object is defined as the product of the component of the force along the direction of displacement and the magnitude of the displacement.

**Calculation of Work:**

When calculating work, only the force that is applied in the direction of motion is considered. W=Fdcosθ

**Postive Work:**

If the force and displacement are in the same direction, that would be considered positive work.

**Power:**

Power is a measure of how quickly work is done.

**Kinetic Energy:**

Kinetic energy is energy of motion. All moving object possess kinetic energy.

**Gravitational Potential Energy**:

Gravitational Potential energy is the energy an object possessed due to its position.

**Base Level:**

The point that height is measured from. Any point can be used as a base level because the energy amount you calculate will be relative.

**Conservation of Energy:**

Energy cannot be created or destroyed; it may be transformed from one form into another, but the total amount of energy never changes.

**Conservative Force:**

A force is classified as conservative if the work it does on a moving object is independent of the path between the initial and final position, OR it does no net work on an object moving around a closed path, starting and finishing at the same point. Friction or air resistance is an example of a non conservative force.