Two blocks A and B having mass m = 1 kg ...

Two blocks A and B having mass m = 1 kg and M = 4 kg respectively are attached to a spring and placed vertically on a weighing machine as shown in the figure. Block A is held so that the spring is relaxed. A is released from this position and it performs simple harmonic motion with angular frequency `w = 25 rad s^(-1)`. The spring remains vertical

(a) Find the reading of the weighing machine as a function of time. Take t = 0 when A is released.
(b) What is the maximum reading of the weighing machine ?

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The correct Answer is:

(a) 50-10 cos (625t) , (b) 6-0 N

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