During the head on collision of two masses 1 kg and 2 kg the maximum energy of deformation is 
J. If before collision the masses are moving in the opposite direction, then their velocity of approach before the collision is :
A
10 m/sec.
B
5 m/sec.
C
20 m/sec.
D
10 
m/sec.
m/sec.
Text Solution
Verified by ExpertsThe correct answer is:
A
( a ) Δ U = 
(V 1 – V 2 ) 2 = 
(V 1 – V 2 ) 2 × 
= 
putting m = 1 kg
(V 1 – V 2 ) = 10 m/sec.
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