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April 25, 2014

April 25, 2014

Posted by **simon** on Monday, September 24, 2012 at 6:04am.

What is the acceleration of the boy and his sled?

- physics -
**Elena**, Monday, September 24, 2012 at 3:28pmx: m•a= m•g•sinα +F - F(fr),

y: 0= - m•g•cosα +N.

F(fr)=μ•N= μ• m•g•cosα

m•a= m•g•sinα +F - μ• m•g•cosα

a= g(sinα - μ•cosα)+ F

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