Question

A body of mass 2kg is moving with 10m/s. If another body of mass 12kg is
moving with the same momentum. Find its velocity ?
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Answer 1

Answer:

Explanation:

There is no external force, so we can apply momentum conservation.

initial momentum =  

P

=mv  

i

^

+mv  

j

^

​  

 

∣  

P

∣=  

2

​  

mv

Final momentum = 2m×V

By the law of conservation of momentum  

2m×V=  

2

​  

mv⇒V=  

2

​  

 

v

​  

 

In the problem v=10m/s (given )  

∴V= 2 \10

​  

=√5\2 m\s

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