1.Two blocks each of mass m = 3.23 kg are fastened to the top of an elevator as
ID: 2136150 • Letter: 1
Question
1.Two blocks each of mass m = 3.23 kg are fastened to the top of an elevator as in the figure.
http://www.webassign.net/sercp9/4-p-021.gif
(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.
2. A 4.0-kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 3.0 m/s2, find the force exerted by the rope on the bucket
T1 =T2 = Two blocks each of mass m = 3.23 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 89.0 N, what maximum acceleration can the elevator have before the upper string breaks? A 4.0-kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 3.0 m/s2, find the force exerted by the rope on the bucket
Explanation / Answer
a) T1 = (m1+m2)(a+g) = 73.64 N
T2 = m(a+g) = 36.82 N
b) T1 = (m1+m2)(a+g) = 89 N
a = 3.98 m/s2
2 . F - 4g = 4 x3
F = 51.2 N
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