Two blocks each of mass m = 2.88 kg are fastened to the top of an elevator as in

Question

Two blocks each of mass m = 2.88 kg are fastened to the top of an elevator as in the figure. (a) If the elevator has an upward acceleration a = 1.60 m/s2, find the tensions T1 and T2 in the upper and lower strings. T1 = ______ Your response differs from the correct answer by more than 10%. Double check your calculations. N T2 = _______ Your response differs from the correct answer by more than 10%. Double check your calculations. N (b) If the strings can withstand a maximum tension of 90.0 N, what maximum acceleration can the elevator have before the upper string breaks? ________ m/s2

Explanation / Answer

a)T2+mg-T1=ma mg-T2=ma => T2=2.3616 N T1=4.7232 N b)=>T1=90N and T2=45N a=5.625 m/sec^2 downwards

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