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victus00 [196]
3 years ago
13

What is the efficiency of the machine in Figure 7.2 if the weight of the box is 200 N and required 98 N of effort Force?

Physics
1 answer:
zepelin [54]3 years ago
3 0
this question is tricky but the answer is C
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Answer:

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Explanation:

Given

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Ignoring frictional losses, at the bottom of the plane

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Using Law of conservation of energy we have

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knowing that

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we have

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⇒  v = √(g*h/0.75) = √(9.8 m/s²*1.5 m/0.75)

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