Homework Help: physic

Posted by Chan on Friday, October 16, 2009 at 4:41am.

The coefficient of static friction between the m = 3.20 kg crate and the 35.0° incline of the figure below is 0.340. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

physic - bobpursley, Friday, October 16, 2009 at 9:27am
I assume a crate is on an incline.

In this case, fricion + force applied has to be greater than the component of weight down the plane.

friction: mg*mu*CosTheta
weight down plane: mgSinTheta

force+friction=weight down plane
solve for force.

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