Q.

An elastic spring is compressed between two blocks of masses 1 kg and 2 kg resting on a smooth horizontal table as shown. If the spring has 12J of energy and suddenly released, the velocity with which the larger block of 2 kg moves will be

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a

2 m/s

b

4 m/s

c

1 m/s

d

8 m/s

answer is A.

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Detailed Solution

12Kx2=KE1+KE2 and m1v1=m2v2
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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An elastic spring is compressed between two blocks of masses 1 kg and 2 kg resting on a smooth horizontal table as shown. If the spring has 12J of energy and suddenly released, the velocity with which the larger block of 2 kg moves will be