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Most Important Selected Qs for JEE AdvancedPhysicsCenter of Mass, Momentum and Collision

A thin heavy metal plate is being bombarded by a perpendicular beam of gas particles from both sides as shown in the figure. The solid dots are representing the molecules hitting from left side and the faint dots are the molecules hitting from right side. The mass of these gas particles is m=10⁻²⁶ ~kg and velocity before hitting is v₀=5 ~m / s . Volume density of the gas particles on both sides is n =10²⁵ per m ^3 .

Correct answer

8

Step-by-step solution

aligned & F=2 m A [ (v₀+v )^2- (v₀-v )^2 ] & =2 (10⁻²⁶ ) (10²⁵ )(1) [(5+2)^2-(5-2)^2 ] & =0.2 40=8 ~N aligned

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