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A 4 $\mathrm{kg}$ box is accelerated upwards by a string with a breaking strength of 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 14

Practice Test 4

Section 1

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the problem. We have given a four carry boxes accelerated apart by a string with a breaking strength of 18. You can the massive boxes for Katie. What is the maximum of our acceleration that can be applied in the box without breaking the stream? Suppose that exploration is a in the poor direction. This is tension T and in the downward direction M G force will be there. So we will write. According to the Newton's second law equation, Net force should be able to mass into observation. T minus mg should be called UMA's into exploration, so they have to find the maximum acceleration. So we know that exhibition will be called TV. I am my energy now. The maximum value of tension is 18 million. The mass is four K. G minus 9.81 So this is equal to 20 minus 9.81 This is the acceleration. So if we saw this, this is a quarter 20 minus 9.81 It is a quarter 10.2 or if we write geophysical to 10. So it is around 10 winter per second squared. So option B will be correct, right?

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