Question

Two billiard balls of mass $005\, kg$ each moving in opposite directions with $10 \, ms ^{-1}$ collide and rebound with the same speed If the time duration of contact is $t =0005 \, s$, then what is the force exerted on the ball due to each other?

• A. 100 N
• B. 200 N
• C. 300 N
• D. 400 N

Answer 1

Answer: (B)

200 N

Answer 2

Change in momentum of any one ball
∣ΔP∣=2×0.05×10
∣ΔP∣=1
∣∣​Fav​∣∣​=Δt∣ΔP∣​
Fav​=200N