Two blocks A and B of mass m and 2m are connected by a mass less spring of force constant k. They are placed on a smooth horizontal plane. Spring is stretched by an amount x and then released. The relative velocity of the blocks when the spring comes to its natural length is –
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
From conservation of mechanical energy
kx 2 = 
... (1)
Here, µ = reduced mass of the blocks
= 
= 
and v r = relative velocity of the two.
Substituting in Equation (1), we get
kx 2 = 
v r = 
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