A frictionless pulley of negligible weight is suspended from a spring balance .Masses of 1kg and 5kg are tied to the two ends of a string which passes over the pulley.The masses move due to gravity.During motion, the reading of the spring balance will be
Asked by m.nilu
3rd August 2018,
10:18 AM
Answered by Expert
Answer:
Forces acting at 1 kg load, 5 kg load and pulley are shown in figure.
Let us assume 1 kg load moves upward with acceleration a and 5 kg load moves downward with acceleration a.
Let T be the tension in the string.
at 1 kg load :- T - g = a ..................(1)
at 5 kg load :- T - 5g = -5a ...............(2)
By solving the above two equations, we get a = (2/3)g and T = (5/3)g
Hence tension in the spring, 2T = (10/3)g ≈ 33 N
Answered by Expert
4th August 2018,
5:58 AM
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