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April 16, 2014

Homework Help: physics

Posted by Lisa on Monday, December 7, 2009 at 6:14pm.

You push a 320 N trunk up a 20.0 inclined plane at a constant velocity by exerting a 213 N force parallel to the plane's surface.
(a) What is the component of the trunk's weight parallel to the plane?

(b) What is the sum of all forces parallel to the plane's surface?

(c) What is the magnitude and direction of the friction force?



upward, perpendicular to the plane

upward along the plane

downward, perpendicular to the plane

downward along the plane

(d) What is the coefficient of friction?

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