Posted by **Angela** on Thursday, October 11, 2012 at 4:53pm.

An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.

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**bobpursley**, Thursday, October 11, 2012 at 4:59pm
workin=frictionwork+changePE+changeKE

103N*7.3m=mu(mg)cos30*7.3+mg*7.3*sin30+KEchange

solve for KE change

- Physics -
**Angela**, Thursday, October 11, 2012 at 8:37pm
I got 571, but it says it's wrong!!

- Physics -
**Angela**, Thursday, October 11, 2012 at 8:38pm
Nevermind!! I got it! Thank you so much

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