Part A Item 5 What is the work Wf done on the block by the force of friction as

Question

Part A Item 5 What is the work Wf done on the block by the force of friction as the block moves a distance L up the incline? A block of weight w sits on a plane inclined at an angle as shown. (Figure 1) The coefficient of kinetic friction between the plane and the block is Express your answer in terms of some or all of the following: u, , L. Hints Figure 1 of 1 Submit My Answers Give Up Incorrect; Try Again; 3 attempts remaining Part B What is the work W done by the applied force of magnitude F? Express your answer in terms of some or all of the following: L. W-

Explanation / Answer

a) friction force , f = Uk*w*cos(theta)

workdone = F.S = - Uk*w*cos(theta)*L J

b) applied force , F = w*sin(theta) + f = w*sin(theta) + Uk*w*cos(theta)

workdone = F*S = [w*sin(theta) + Uk*w*cos(theta) ] *L J

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