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Conservation of Mechanical Energy

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Presentation on theme: "Conservation of Mechanical Energy"— Presentation transcript:

1 Conservation of Mechanical Energy

2 Law of Conservation of energy
In a frictionless system, mechanical energy is conserved (energy can change form, but the total amount of energy remains constant) Mechanical energy is the sum of potential and kinetic energy

3 Calculations For Closed Systems

4 Conservation of Energy in an Open System
In some cases energy is lost to friction or heat In the cases, mechanical energy is lost, but total energy is not

5 *Sample Problem – Open System
Calculate the energy lost to friction in the following example

6 Brainiacs – Loss of Mechanical Energy

7 Homework p. 125 #1-13 Challenge Qs: p. 128 #1-9

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