Physics-
General
Easy
Question
Three objects 
and 
are kept in a straight line on a frictionless horizontal surface. These have masses 
and 
respectively. The object 
moves towards 
with a speed 
and makes an elastic collision with it. Thereafter, makes completely inelastic collision with . All motions occur on the same straight line. Find the final speed (in 
) of the object
The correct answer is:
After elastic collision strikes to with velocity of 
. Now collision between and is perfectly inelastic
By the law of conservation of momentum
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