A block m 1 strikes a stationary block m 3 inelastically. Another block m 2 is kept on m 3 . Neglecting the friction between all contacting surfaces, the fractional decrease of K. E. of the system in collision is:
A
B
C
D
.
Text Solution
Verified by ExpertsThe correct answer is:
C
Since the impact between m 1 and m 3 is inelastic, m 1 and m 3 will move together towards right and m 2 does not move due to the absence of friction. The velocity of the combined mass
= 
⇒ ⇒ 
a= 1 – 
= 
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