Editor Staff asked 1 year ago
A ball of mass 100 g is moving with a velocity of 3 m/s towards east. A cube of mass 200 gram is moving towards west with a velocity of 7 m/s. If the collision is perfectly elastic, what is the magnitude of the final momentum of the system in Kg-m/s?
(a) 1700
(b) 1500
(c) 1300
(d) 1100
The question was asked during an online interview.
My doubt stems from Collision topic in chapter Work, Energy and Power of Physics – Class 11
Select the correct answer from above options
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Editor Staff answered 1 year ago
Right answer is (d) 1100
The explanation: The initial momentum of the system = momentum of ball + momentum of cube = 1100 Kg-m/s. Since the momentum is conserved, the initial momentum = final momentum. Hence the final momentum is 1100 Kg-m/s.
