Work Energy And Power Question 324

Question: Two masses connected by a mass less spring .are placed on a horizontal smooth surface. The spring is initially compressed by 3 cm. The system is released from rest. The velocity (in m/s) of the 2 kg mass, when spring attains natural length is to

Options:

A) 32

B) 23

C) 32

D) 3B=(1/5x30)

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Answer:

Correct Answer: A

Solution:

[a] m1v1=m2v2

and 12Kx02=12m1v12+12m2v22.

Solving :v2=32



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