Two bodies of masses 2 Kg and 7 Kg are moving with velocities of 2 m/s and 7 m/s respectively. What is the total momentum of the system in Kg-m/s?

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Editor">Editor Staff asked 1 year ago

Two bodies of masses 2 Kg and 7 Kg are moving with velocities of 2 m/s and 7 m/s respectively. What is the total momentum of the system in Kg-m/s?
 
(a) 50
 
(b) 53
 
(c) 28
 
(d) 0
 
I had been asked this question in quiz.
 
The query is from Laws of Motion in portion Laws of Motion of Physics – Class 11
Select the correct answer from above options 
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Editor">Editor Staff answered 1 year ago

The correct answer is (b) 53
 
Best explanation: Both the bodies are moving with constant velocity, hence both of them have momentum. The momentum of the system is the sum of the momenta of the bodies. Hence total momentum = 2 x 2 + 7 x 7 = 53 Kg-m/s.

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