Question

Question 3 View Policies Current Attempt in Progress In the figure, a horizontal force of magnitude 18.0 N is applied to a 2.85 kg book as the book slides a distanced -0.67 m up a frictionless ramp at angle -30°: (a) During the displacement, what is the network done on the book by 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? (a) Number Units (b) Number Units

Answer 1

» 18 cos 30=15.59 27.96 Singo B E =18 N 2 7. Coszo. a 24.21 my 18 Sin 30= 9 ng=2.85x9.81=27.96N = 13.98N30 ( 0 Block travels 0.67 m up the in cline → work done by Fa= force in the direction of displacementy displacement = 15.59% 0.67€ 10.44 J: work done by gsarital force in the direction is displacement & displacement = €13.98) * 0.67 =-9.37 J An e work force in the displacement done by Nemal force = direction is displacement ~( 24 2t43) xo = 0 J. ® AKE = net work done KFF -O=W fer + Wg mu? = 10.44- 9.37 ve 2x (10.44-9.37) 2.85 v= vs 5 0.75 = 0.87 m/s. An