Two blocks each of mass m = 3.19 kg are fastened to the top of an elevator as in

Question

Two blocks each of mass m = 3.19 kg are fastened to the top of an elevator as in the figure.

T1 =
Your response differs from the correct answer by more than 10%. Double check your calculations. N T2 = N Two blocks each of mass m = 3.19 kg are fastened to the top of an elevator as in the figure. If the elevator has an upward acceleration a = 1.60 m/s2, find the tensions T1 and T2 in the upper and lower strings. If the strings can withstand a maximum tension of 87.0 N, what maximum acceleration can the elevator have before the upper string breaks?

Explanation / Answer

(a) Total acceleration = 9.81 + 1.6 = 11.41 m/sec^2

T1 = 3.19 * 11.41 = 36.398 N ( lower string)

T2 = 6.38 * 11.41 = 72.796 N (upper string )

(b) 87 = 6.38 * ( 9.81 + a )
87 = 62.59 + 6.38 a
6.38 a = 24.41
a = 3.83 m/s^2

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