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Asked Dec 10, 2019
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A 900 N crate rests on the floor. How much work is required to move it at a constant speed a.) 4.0 m
along the floor against a friction force of 180 N, and b.) 4.0 m vertically? [a = 720 J, b = 3600 J]
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A 900 N crate rests on the floor. How much work is required to move it at a constant speed a.) 4.0 m along the floor against a friction force of 180 N, and b.) 4.0 m vertically? [a = 720 J, b = 3600 J]

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Expert Answer

Step 1

Given,

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Force F = 900 N Distance d = 4.0 m

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Step 2

Part (a): When the displacement along the floor and opposite to friction force:

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For constant speed, a =0 F.. —D та net F = 0 net so, W = Fplied -C Фрpled W =(F -f ).d W =(0-180).4 net W =720 J

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Step 3

Part (b): When the displacement...

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W = F.d W = 900.4 W = 3600 J

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