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ser-zykov [4K]
2 years ago
13

A constant force of 20. newtons applied to a box causes it to move at a constant speed of 4.0 meters per second. How much work i

s done in the boxin 6.0 seconds?
1) 240 joules
2) 120 joules
3) 480 joules
4) 80. joules
Physics
1 answer:
podryga [215]2 years ago
6 0
The answer is 3) 480 joules
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Answer:

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(c) - 570.75 J

(d) 0 J, 0 J

(e) 0 J  

Explanation:

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distance, s = 7 m

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F = 0.26 x m x g = 0.26 x 32 x 9.8 = 81.54 N

(b) The work done on the crate

W = F x s = 81.54 x 7 = 570.75 J

(c) Work done by the friction

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(d) Work done by the normal force

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(e) The total work done is

Wnet = W + W' + W'' + Wg = 570.75 - 570.75 + 0 = 0 J  

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One negative change you may encounter as a student or an employee​
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Answer:

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