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A 4 kg box is accelerated upwards by a string with a breaking strengthof 80 $\mathrm{N}$ . What is the maximum upward acceleration that can be applied on the box without breaking the string?(A) 2.5 $\mathrm{m} / \mathrm{s}^{2}$(B) 5.0 $\mathrm{m} / \mathrm{s}^{2}$(C) 7.5 $\mathrm{m} / \mathrm{s}^{2}$(D) 10 $\mathrm{m} / \mathrm{s}^{2}$

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Chapter 4

Practice Test 4

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A box with a mass of 2 kg …

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There are two forces acting on the books. There is one is attention. And one is tiu the force of gravity. So the acceleration of the box, it will be mass times on 4 16 1 up box will create exploration, which is forces master. I'm exploration. That is attention minus off. Forced off gravity. Attention. We have his maximum 80 Newton minus. We have a box or four kg times. Um, 10 gravitational exploration. I want to find exploration than I will bring down a mass here. You just before. So 80 minus 40 40 divided by four. Used me. Uh, 10 meters per second squared. So this is my exploration off the box and option I have here is, um note. Aye. Ayes 2.5. He's five. And C 7.5 d is 10. So option I have is, um d which is 10 s o d. End off the problem. Thank you for

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