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I m a student of class 9 having a problem in numerical: A trolley is moving on smooth horizontal path with velocity 20 m/sec having mass of 20 kg . At t=0,A bag of 5kg with grain put in it having a hole which drops 0.2 kg/sec grain. What is approx velocity of trolley at t=10 sec.

Prretam kumar , 7 Years ago
Grade 9
anser 1 Answers
Ashish Kumar

Last Activity: 7 Years ago

Since momentum remains conserved.M1v1=m2v2.25*20=23*v.=> v =21.73m/s.Hence final velocity is 21.73m/s.

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