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A worker moves a 30 $\mathrm{kg}$ box by pulling on it with a rope that makes a $60^{\circ}$ angle with the horizontal. If the worker applies a force of 40 $\mathrm{N}$ and pulls the box over a distance of $20 \mathrm{m},$ how much work did the worker do?(A) 100 $\mathrm{J}$(B) 200 $\mathrm{J}$(C) 400 $\mathrm{J}$(D) 800 $\mathrm{J}$

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Chapter 14

Practice Test 4

Section 1

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a worker moves are 30 kg box by pulling on it with a rope that makes 60 anger 60 degree angle with the horizontal support this is a box and this is angle 60 degrees with the horizontal mass of this box is 30 kg. If the worker applies a force of 14, Newton Force is equal to 14. You 10 and pulls the works over a distance of 20 m. Right? How much work did the worker do? So we have to find them who have them. So we know that wagon is equal to F dot s director f not s. So this is equal to forces 14 into court 16 The direction of displacement and displacement is given 20 m. So this is equal to 14 to 20. That means 802 cost 60. So the work done by the worker is equal to 800. Multiply with cost 60. This is equal to 400 jewels. So the work done is 400 jewels. If you check our options also see we'll be right. Option. Right. So this is the answer. Thank you.

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