62. (a) The force GFof the incline is a combination of normal and friction force which is serving to “cancel” the tendency of the box to fall downward (due to its 19.6 N weight). Thus,GFmg=upward. In this part of the problem, the angle φbetween the belt and GFis 80°. From Eq. 7-47, we have
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This note was uploaded on 03/19/2010 for the course PHYSICS 191262 taught by Professor Najafzadeh during the Spring '09 term at The Petroleum Institute.