Question

The coordinates of centre of mass of a uniform flag shaped lamina (thin flat plate) of mass 4kg. (The coordinates of the same are shown in figure) are : 

(1) (1.25m, 1.50m)

(2) (1m, 1.75m)

(3) (0.75m, 0.75m)

(4) (0.75m, 1.75m)

Answer 1

Answer is (4) (0.75m, 1.75m)

m₁ = 3kg

m₂ = 1kg

Mass of plate-1 is assumed to be concentrated at (0.5, 1.5)

Mass of plate-2 is assumed to be concentrated at (1.5, 2.5).

Answer 2

Answer is (4) (0.75m, 1.75m)