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The scale of a spring balance reading fr...

The scale of a spring balance reading from 0 to 10 kg is 0.25 m long. A body suspended from the balance oscillates vertically with a period of `pi//10` second. The mass suspended is (neglect the mass of the spring)

A

10 kg

B

0.98 kg

C

5 kg

D

20 kg

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The correct Answer is:
B
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ERRORLESS -SIMPLE HARMONIC MOTION-spring pendulum
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