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April 18, 2014

April 18, 2014

Posted by **lvf** on Tuesday, October 9, 2012 at 2:42pm.

what is the speed after 12m. starting from rest and x=0

- phy -
**Elena**, Wednesday, October 10, 2012 at 8:14amF=18-0.53•x

a=F/m=(18-0.53•x)/5.5

v=sqrt(2•a•x)=sqrt[(18-0.53•x)x/5.5]=

= sqrt[(18 - 0.53•12) •12/5.5=5.04 m/s

- phy -
**n8**, Sunday, November 11, 2012 at 12:17amthe first answer is wrong

- phy -
**Alex**, Sunday, February 23, 2014 at 11:41pmIntegral of F(x) = .5mv^2

18x-.5(.53)x^2=.5mv^2

find v.

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