# Physical Science #3

### 13 terms by RonWorster

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### Work

The transfer of energy to an object by the application of a force that causes the object to move in the direction of the force.

### Power

A quantity that measures the rate at which work is done or energy is transferred.

### Joule

A unit in the SI system used to express the amount of work or energy; equal to a N x M

### Horsepower

A unit used in the U.S. customary system to express power; equal to 746 watts.

### Watt

A unit used in the SI system to express the amount of power, equal to 1 Joule per second.

### Energy

The capacity to do work.

### Potential Energy

The energy due to the position, shape, or condition of an object.

### Gravitational Potential Energy

The energy that an object has because of its height relative to the earth surface.

### Kinetic Energy

Energy that an object has due to its motion.

### Elastic Potential Energy

Energy that an object or system has due to the distortion in the volume and/or the shape of the material. Rubber bands and springs are good examples of objects that can have this type of energy.

### Mechanical Energy

The sum of kinetic and potential energies.

### Non mechanical Energy

Types of energy such as sound, light, and heat.

### Law of Conservation of Energy

The total amount of energy in the universe never changes, although energy may change from one form to another.

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