Introduction to Mechanical Energy with Friction

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This is an AP Physics 1 topic.

0:00 Intro
0:09 When is Conservation of Mechanical energy true?
0:37 Work due to Friction equals the Change in Mechanical Energy
1:57 Determining the angle in the work equation
3:01 When the angle is not 180 degrees
3:50 What if the work done by friction is zero?
4:31 Always identify …

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You are absolutely awesome! I love your videos and I was able to learn so much. Thanks to your videos I passed my AP physics final and I actually know the stuff rather than just having it crammed in my head for a day for the final. Thank You!

Shahabbi
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I learned more about physics from your videos this semester than from my university calc based physics class.

tathagata
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Why is the force of friction on the hockey puck not directed to the left when you have it resting on top of another block and the two slide together?

thenamelessking
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Mr. P, shouldn't the force of friction point to the left because the hockey puck is accelerating to the right, so to oppose that motion, the static friction would be to the left, right?

Anveshkrishna
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Thanks for the vid!
Do you have any physics video lectures about electromagnetism?

pukamon
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Quick question- for conservation of mechanical energy to apply, doesn't the work done by the resistive force also need to equal zero?

Reallycoolguy
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Please write the complete mathematical theorem related to demand driven input output theorem and supply driven input output theorem related to energy shortages impact on Pakistan's economy, I need theorem on this topic, can you provide me?

ranausama