A box of weight Fg=2N accelerates down a rough plane that isinclined at an angle
ID: 2118844 • Letter: A
Question
A box of weight Fg=2N accelerates down a rough plane that isinclined at an angle %u03C6=30 degrees above the horizontal,as shown . The normal force acting on the box has a magnituden=1.7, the coefficient of kinetic friction between the box and theplane is %u03BCk=0.3, and the displacement d of the box is1.8 m down the inclined plane. What is the work Wgrav done on the box bygravity? Express your answers in joules to twosignificant figures. A box of weight Fg=2N accelerates down a rough plane that isinclined at an angle %u03C6=30 degrees above the horizontal,as shown . The normal force acting on the box has a magnituden=1.7, the coefficient of kinetic friction between the box and theplane is %u03BCk=0.3, and the displacement d of the box is1.8 m down the inclined plane. What is the work Wgrav done on the box bygravity? Express your answers in joules to twosignificant figures. What is the work Wgrav done on the box bygravity? Express your answers in joules to twosignificant figures.Explanation / Answer
displacement = 1.8 along the incline
displacement in vertical direction = 1.8 sin 30 = 0.9
so work done by gravity = 0.9*2 = 1.8 J
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