Static and kinetic friction example | Forces and Newton's laws of motion | Physics | Khan Academy

Thinking about the coefficients of static and kinetic friction. Created by Sal Khan.

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Thank you. Physics can be so scary when your teachers talk at you a little, hands you a book, and says, "Do this." 

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Learning physics with this is a life-saver. Thanks so Much!!!!

[Dani]

Have a test on this for my AP Physics class in a few hours. This video was great. Feel ready now.

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In preparation of my last exam I used your videos for what I didn't fully understood, end result?
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[BloodAsp]

Having this, I was able to do a problem where there was a force at theta, and had to calculate for an adjusted F_n in order to find the blocks kinetic acceleration. A great help thank you!

[debasissahu]

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[josephjerome]

That block is moving pretty fast.  There should be a follow-up problem where it crashes into something.  

[eduardoterriquez]

Thanks :D I have a mid-term in an hour. Wish me luck!!!

[evylinda]

great lecture! my statics final is in 2 1/2 hours and I have officially been partially relieved of this confusion.

[debasissahu]

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[paritoshagarwal]

4:55 total =100 N, force needed to overcome F of static friction =29.4. Static friction <29.4 Net/remaining force in right direction = 70.6N

[oluwasefunmioluyede]

thanks for this opportunity to learn from the expert

[daanmeere]

Great explanation, makes a lot of sense now!

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Really can't believe this whole academy has a one-man-army narrator and (not sure) teacher.

[joshuasusanto]

Thank you!!! Thank you!!!! Thank My teacher skipped the fundamentals and even the common equations and straight to the compound You are a great help!!

[rahulpdiggi]

Explained very well. Please explain about velocity triangles in turbines

[claudiarojas]

very clear! you are good at explaining