Physics Help Forum Inclined Plane

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 Nov 23rd 2011, 04:53 AM #1 Junior Member   Join Date: Oct 2011 Posts: 3 Inclined Plane Hi, I need help in solving the following inclined plane problem. A block of mass 2Kg is released from rest on an frictionless inclined plane 30 degrees to the horizontal. If length of inclined plane is 12m, find the workdone by gravity and normal force when block reaches ground. Thanks and regards, AN
 Mar 26th 2012, 12:07 PM #2 Physics Team     Join Date: Jun 2010 Location: Naperville, IL USA Posts: 2,269 Work done by gravity is simply mgh, where h = vertical distance traveled. So W = mg(12 m x sin(30 deg)). The normal force is the component of te block's weight perpendicular to the ramp: N = mg cos(30 deg)

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