A block of weight which makes an angle 6. 240 respect to the herunnta, shown in

Question

A block of weight which makes an angle 6. 240 respect to the herunnta, shown in the figure (Figure 1)Aforoe of magnhude N.applied parallel to the incline is just suscent the block up he plane at constant speed. Part A The block moves up an with constant What is the tota work done on book by forces ashe bock oves a distance L 400 m incine? Include only the work done the block has started moving at speed not the work needed to start the block moving from rest. constant Express your answer numerically in joules. SubmA Hints My Answers Give Up Review Pan Part B Express your answer numerically in My Answers Give up Review Part Part C Express your answer numerically in joules.

Explanation / Answer

Part A :

Wtotal= Fd - wLsin23 + 0

Wtotal= 13.7 X 4 - 35 X 4 X sin23

Wtotal= - 1.46 J

Part B:

Wg = w L sin23

= - 35 X 4 X sin23

= - 54.7 J

Part C :

WF = wL

= 13.7 X 4

= 54.8 J

Part D :

the workdone is ZERO J

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