# PH.5 g - Work, Power, and Energy

The student will investigate and understand the interrelationships among mass, distance, force, and time through mathematical and experimental processes. Key concepts include

g)  work, power, and energy.

Bloom's Levels:  Analyze; Understand

### BIG IDEAS

• I can explain how machines have revolutionized the world.

### UNDERSTANDING THE STANDARD

The concepts developed in this standard include the following:

• Work is the mechanical transfer of energy to or from a system and is the product of a force at the point of application and the parallel component of the object’s displacement. The net work on a system equals its change in velocity.
• Forces within a system transform energy from one form to another with no change in the system’s total energy.
• For a constant force acting on an object, the work done by that force is the product of the force and the distance the object moves in the direction of the force. The net work performed on an object equals its change in kinetic energy.
• Power is the rate of doing work.

### ESSENTIALS

In order to meet this standard, it is expected that students will

g) solve problems involving mechanical work, power, and energy.

### KEY VOCABULARY

Updated: Dec 01, 2017