Impulse = change in momentum
Ball (a) ∣Δp∣=2mu=J1
Ball (b) ∣Δp∣=2mucos45∘=J2
J2J1=cos45∘1=2
Two billiard balls of equal mass 30g strike a rigid wall with same speed of 108 kmph (as shown) but at different angles. If the balls get reflected…
JEE Main 2021 — Physics Mechanics
2021mcqeasy
Two billiard balls of equal mass 30g strike a rigid wall with same speed of 108kmph (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:
Official previous-year question
Held on 25 Jul 2021 · Verified 6 Jul 2026.
Options
- A
1:1
- B
2:1
- C
2:1
- D
1:2
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