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Gaurav Sharma Grade: 11
        There is a rectangular plate of mass M kg of dimensions (a × 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?
one year ago

Answers : (1)

Vikas TU
6872 Points
										
Just apply the concept of Torque simply at the hinged:
2mv*(abn/2 )= 3b*Mg*b/2
v = (2/3)Mg/mnb
 
after putting the values we get
v = 10 m/s approx.
one year ago
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