Power

We learn how power relates to electrical and mechanical systems. We explore the multiple ways we can express power mathematically by working through an example problem that ties in Newton's second law and kinematic equations to find its solution.

Segment 4i: Power We learn how power relates to electrical and mechanical systems. We explore the multiple ways we can express power mathematically by working through an example problem that ties in Newton's second law and kinematic equations to find its solution.

Premiere Date: July 24, 2018 | Runtime: 00:05:33

## Learning Objectives

-Define power, work, and energy.

-Define power qualitatively and quantitatively.

-Understand how power can be calculated by looking at work done by an object over time or by finding the force exerted on an object times its velocity.

-Discuss how power relates to electrical as well as mechanical systems.

## Toolkit

Note-Taking Guide and Questions to Consider
Practice Problems
How Powerful Are You Lab

## Vocabulary

power (P) - the amount of work done in a given amount of time; the amount of force exerted at a given velocity; SI unit is the watt.

work (W) - when a force causes displacement of an object.

## Georgia Standards of Excellence

SP3Obtain, evaluate, and communicate information about the importance of conservation laws for mechanical energy and linear momentum in predicting the behavior of physical systems.

SP3.bUse mathematics and computational thinking to analyze, evaluate, and apply the principle of conservation of energy and the Work-Kinetic Energy Theorem. • Calculate the kinetic energy of an object. • Calculate the amount of work performed by a force on an object.

SP3.cPlan and carry out an investigation demonstrating conservation and rate of transfer of energy (power) to solve problems involving closed systems.

## Request Teacher Toolkit

The Physics in Motion teacher toolkit provides instructions and answer keys for study questions, practice problems, labs for all seven units of study.  GPB offers the teacher toolkit at no cost to Georgia educators. It will be available in September 2018. To preorder your teacher toolkit, complete and submit this form to request the teacher toolkit. You only need to submit this form one time to get materials for all seven units of study.