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Chapter 8: Energy Questions
Chapter 8 Energy Questions
13
Physics
11th Grade
12/21/2011
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Term
Efficiency
 Definition
work output/work input
Term
Mechanical advantage
 Definition
input distance/output distance
Term
Work
 Definition
W = Fd║
Term
Power
 Definition
P = W/t
Term
Kinetic Energy Equation
 Definition
KE = ½ mv2
Term
Potential Energy Equation
 Definition
PE = mgh
Term
Conservation of Energy
 Definition
KE + PE = KE + PE
Term
Units for Energy
 Definition
Joules
Term
Units for Power
 Definition
Watts
Term
If you push on a wall is work done?
 Definition
W=Fd; so only if the wall moves
Term
What are the two types of Mechanical Energy?
 Definition
Potential Energy and Kinetic Energy
Term
What does a machine do?
 Definition
Multiplies forces or changes direction of forces
Term
Name the six simple machines
 Definition
lever, wedge, inclined plane,
pulley, screw, wheel and axle
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