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JEE Main20208 Jan 2020Morning ShiftPhysicsCenter of Mass, Momentum and CollisionActual

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

Options

  1. A1.25 m , 1.50 m
  2. B0.75 m , 1.75 m
  3. C0.75 m , 0.75 m
  4. D1 m , 1.75 m

Correct answer

B. 0.75 m , 1.75 m

Step-by-step solution

r → c m = 2 × i ^ 2 + j ^ + 2 × i ^ + 5 j ^ 2 4 r → c m = 3 4 i ^ + 7 4 j ^

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