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Title:

Energy

Description:

Energy Energy & Work Closely related Energy: ability to do work Work: transfer of energy Both measured in Joules Energy Types Kinetic Energy: Energy in motion ... – PowerPoint PPT presentation

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Title: Energy


1
Energy
2
Energy Work
  • Closely related
  • Energy ability to do work
  • Work transfer of energy
  • Both measured in Joules

3
Energy Types
  • Kinetic Energy Energy in motion
  • Potential Energy Stored energy (not moving)
  • depends on position or condition of object

4
Examples of KE
5
Examples of PE
Boulder on top of cliff
Firecracker
battery
6
Calculating KE
  • KE ½ mv2 m mass
  • v velocity
  • Which increases kinetic energy more doubling the
    mass or doubling the velocity?

7
Gravitational PE
  • PE that depends on objects height, and weight
  • G.P.E. mgh
  • m mass
  • g 9.8 m/s2
  • h height.

Which will have greater GPE a rock on a 3 story
ledge or a rock on a 20 story ledge?
8
Mechanical Energy
  • PE Converts to KE and vice versa
  • Mechanical Energy KE PE
  • Total energy
  • Skier
  • Roller Coaster
  • Dart

9
  • Energy conversions
  • Law of conservation of energy
  • Energy cannot be created or destroyed, only
    converted from one form to another
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