There is a rec†an gular plate of mass M kg of dimensions(a× b)hinged to wall along a.The plate is held in horizontal position by striking n small balls uniformly each of mass m per unit area per unit time. These are striking in shaded half retion of the plate.The balls are colliding elastically with velocity v.What is v?(It is given n=100;M=3kg;m=0.01 kg;b=2m;a=1m;g=10m/s^{

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Q. There is a rectangular plate of mass

M k g

of dimensions

(a \times b)

. The plate is held in horizontal position by striking n small balls each of mass m per unit area per unit time. These are striking in the shaded half region of the plate. The balls are colliding elastically with velocity

v

. What is

v

? It is given

n = 100, M = 3 k g, m = 0.01 k g; b = 2 m; a = 1 m

;

g = 10 m / s^{2}

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