Work, Power, & Energy.

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Presentation transcript:

Work, Power, & Energy

WORK W = Fd = ∆ET The process of moving an object by applying a force. 2

Units of Work Look at the equation: W = F • d, the units are the units of force times displacement. So, Newton • meter A Newton • meter is called a Joule 1 Joule = 1 Newton • meter 1 J = 1 N • m 3

4

6

7

Can you determine the work done? 8

The Roller Coaster Problem F D Find the Speeds at points A-F 9 9

POWER ! Power is the rate of doing work. Power is measured in units called Watts 10

Units of Power The units of power are: Joules / Second = Watt J/s = W 11

Forms of Energy 12

Chemical Energy 13

Solar Energy 14

Electrical Energy 15

Wind Energy 16

Sound Energy 17

Nuclear Energy 18

Heat Energy 19

Gravitational Potential Energy Energy that is stored in an object due to its height 𝚫PE = mg𝚫h 20

Kinetic Energy Kinetic Energy is energy of motion. 21

ET = PE + KE + Q Total Energy Total energy is conserved. It can be converted between PE and KE (and into other forms as well) Q = internal energy ET = PE + KE + Q 22

W = 𝚫ET Total Energy and Work When work is done by gravity or against it, the change in PE is equal to the work done. W = 𝚫ET 23

The Roller Coaster Problem F D Find the Speeds at points A-F 24

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