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sir where am i wrong ?this is page39momentum module

Arnab Biswas , 10 Years ago
Grade 11
anser 1 Answers
Aziz Alam

Last Activity: 10 Years ago

You have taken that the momentum is conserved in this example of page 39.
The momentum is not conserved for the combined system of two masses, because there is net external force.Hence the problem is solved by taking into account that momentum change of system is equal to external impulse on the system.
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