4. -1 points HRW10 7 P.024.GO My Notes Ask Your Teacher In the figure below, a h

Question

4. -1 points HRW10 7 P.024.GO My Notes Ask Your Teacher In the figure below, a horizontal force F of magnitude 22.0 N is applied to a 3.26 kg psychology book, as the book slides a distance d-0.500 m up a frictionless ramp at angle 8- 30.0. (a) During that displacement, what is the net work done on the book by Fa, the gravitational force on the book, and the normal force on the book? (b) If the book has zero kinetic energy at the start of the displacement, what is its speed at the end of the displacement? m/s

Explanation / Answer

a)

Work done on the book by Fa

Wa=FdCos(o) =22*0.5*cos30=9.526 J

Work done by gravity

Wg=-MgdSin(o)=-3.26*9.81*0.5*Sin30=-8 J

Work done by Normal force is zero

WN=0

b)

W=dK =9.526-8=1.526 J

(1/2)*3.26*V2=1.526

V=0.96766 m/s

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