Secure https:llsession.mast copy of College Physics i, UTDalla F S 1301.001, Spr

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Secure https:llsession.mast copy of College Physics i, UTDalla F S 1301.001, Spri Hwoz Work on a Black sliding Up a Frictionless Incline e previous 2 of 5 next Work on a Block Sliding Up a Frictionless Incline Part A Ablock of weight 35.0 N sits on a friotionless The block moves up an incine with constant speed. What is the total work Wielal done on the inclined plane, which makes an angle 6 31.0 with block by all forces as the block moves a distance L.290 m up the indine? Include only the respect to the horizontal, as shown in the figure, (Figure work done after the blockhas started moving at constant speed, not the work needed to start the force of magnitude F a 180 N applied parallel to block moving from rest. the incline, is just sufficient to pull the block up the plano at constant speed. Express your answer numerically in joules. Submit Hints My Answers Give up Review Part of 1 Part B What is W the work done on the block by the force of gravity was the block moves a distance L 2.90 m up the incline? Express your answer numerically in joules. Submit Hints My Answers Give up Review Part Part C ALM FaceTime

Explanation / Answer

A) W_total = 0

because, using work-energy theorem workdone is equal to change in kinetic energy.

B) Workdone by gravity = -m*g*sin(theta)*L

= -35*sin(31)*2.9

= -52.2 J

C) WF = F*L*cos(0)

= 18*2.9

= 52.2 J

D) Workdone by Normal force, WN = N*L*cos(90)

= 0 J

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