Spring potential energy example (mistake in math)
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Thank you for spending the time making these wonderful videos. When I go to college, I'll probably have to take a year of physics. Now that I know such videos exist, I will be using yours as a great example. I'll recommend them to my friends as well!
We all make mistakes though. So no harm done!
3 years ago 17
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Real answer is sqr(19.6) which comes out to be 4.42m
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thank you sal, you really saved my ass (again), thanks
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I think k 1/2=5
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haahah now i wont forget "mass/maths general hospital" :D
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@surroundsound5000 that takes the fun out of it! :)
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mgh....haha mass/maths general hospital HAHAHA :))
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@RayMeel it's (2g)^1/2 = 4.43m
aka the square root of 2g
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I lol'd at the 4kg ice cube xD
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the kinetic energy just needs to be >0 for it to go around the loop..... it does not need to be 2g.
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did anyone else get 7m for the REAL answer?
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I think that you did the math wrong. PE= .5kx^2
k= 10. so PE=5x^2
I haven't done this in physics in a while. So I'm not entirely sure.
youngnuts202 3 years ago 8
You're right. It should be 5. I need to be more careful
khanacademy 3 years ago 15