Homework Help: Physics

Posted by Daniella on Monday, August 27, 2012 at 7:42am.

ohh sorry, in my first question...

A 15 kg box sits on a horizontal FORCE.

the coefficient of static fricition between the box and the surface is 0.70. if a force P is exerted on the box at an angle directed 37 degrees below the horizontal, what must be the magnitude of P to get the box moving??

``IT SHOULD BE A 15 kg box sits on a horizontal SURFACE and not A 15 kg box sits on a horizontal FORCE....

Physics - Damon, Monday, August 27, 2012 at 8:14am
We did this problem for you below. I have a typo
force down is 15*9.8 not 15
WLS did it all out for you.
Physics - Damon, Monday, August 27, 2012 at 8:15am
force down = 15 * 9.8 + P sin 37
force horizontal = P cos 37
0.7 (15 * 9.8 + P sin 37) = P cos 37
Physics - Damon, Monday, August 27, 2012 at 8:16am
We both assumed that you meant horizontal surface.
Physics - Daniella, Monday, August 27, 2012 at 8:51am
ok...thanks a lot.....

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