A particle 
of mass 
initially at rest slides down a height of 1.25 m on a frictionless ramp, collides with and sticks to an identical particle 
of mass 
at rest as shown in the figure.
Then, particles 
and 
together collide elastically with particle 
of mass 2 m at rest. The speed of particle 
after the collision with combined body 
would be (Take, 
)
Text Solution
Verified by ExpertsC
Velocity of 
just before collision
Velocity of 
just after collision 
In elastic collision between two bodies of equal masses, velocities are interchanged.
Hence, velocity of 
will become 
.
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