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PhysicsCenter of MassImpulse momentum theoremEasy2 minPYQ_2021
PhysicsEasysingle choice

Two billiard balls of equal mass 30 g strike a rigid wall with same speed of 108 kmph (as shown) but at different angles. If the balls get reflected with the same speed, then the ratio of the magnitude of impulses imparted to ball a and ball b by the wall along X direction is:

Question diagram: Two billiard balls of equal mass 30 g strike a rigid wall wi

Options:

Answer:
B
Solution:

Impulse = change in momentum

Ball (a) |Δp|=2mu=J1

Ball (b) |Δp|=2mucos45°=J2

J1 J2=1cos45°=2

Stream:JEESubject:PhysicsTopic:Center of MassSubtopic:Impulse momentum theorem
2mℹ️ Source: PYQ_2021

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