Natural length of spring is 60 cm and its spring constant is 4000 N/m. A mass of 20 kg is hung from it. The extension produced in the spring (take g=9.8m/s2) is?

Natural length of spring is 60 cm and its spring constant is 4000 N/m

1.	Natural length of spring is 60 cm and its spring constant is 4000 N/m. A mass of 20 kg is hung from it. The extension produced in the spring (take g=9.8m/s2) is?
A.	4.9cm
B.	0.49cm
C.	9.4cm
D.	0.94cm
Answer» B. 0.49cm

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<p>Statement: The amplitude of an oscillating pendulum decreases gradually with time</p>

Natural length of spring is 60 cm and its spring constant is 4000 N/m. A mass of 20 kg is hung from it. The extension produced in the spring (take g=9.8m/s2) is?

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