Question

A body of mass my moving with velocity Va collides with the body of mass m2 moving with the velocity vz. If after collision both the masses come to rest, which
inference can be drawn?
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Answer 1

Answer:

Conserving momentum

mv=mv1+2mv2

v=v1+2v2

e=vv2−v1=1 as collision is head on.

v2−v1=v

v1+2v2=v

v2=32v

v1=3−1v

so K.E ratio=21×m×(3v)221×m×v2

=9:1