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### Conservation of Energy, Part 2

• If friction is present, mechanical energy will not be conserved. Part of the mechanical energy will appear as internal energy, usually in the form of heat. However, the total energy is conserved if one takes into account the different forms of energy.
• For an object sliding down an incline, the mechanical energy at the top is equal to the sum of the mechanical energy at the bottom and the amount of heat generated.

### Conservation of Energy, Part 2

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

• Intro 0:00
• Block Spring Collision 0:16
• Spring Attached to Mass
• Frictionless Surface
• Object Collides with a Spring and Stops
• Amount of Compression in a Spring
• Surface with Friction
• Object Collidse with Spring (Object Stops at Collision)
• Force of Friction
• Object Sliding Down an Incline 10:58
• Example: Object on Inclined Surface
• Frictionless Case to Find Velocity of an Object
• Object at Rough Inclined Surface(Friction Case)
• Heat Produced
• Object Arrives at Lesser Speed with Friction
• Connected Object in Motion 22:35
• Two Objects Connected Over a Pulley ,Spring Connected to One Object
• Coefficient of Friction (Initial & Final Configuration at Rest)
• Object of m1 at Height h
• If No Friction
• Amount of Heat Produced In Presence of Friction
• Extra Example 1: Objects and Springs
• Extra Example 2: Mass against Horizontal Spring