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JEE Main20257 Apr 2025Morning ShiftPhysicsCenter of Mass, Momentum and CollisionActual

A rod of length 5 L is bent right angle keeping one side length as 2 L. The position of the centre of mass of the system: (Consider L =10 ~cm )

Options

  1. A2 i +3 j
  2. B3 i +7 j
  3. C5 i +8 j
  4. D4 i +9 j

Correct answer

D. 4 i +9 j

Step-by-step solution

x _ com = 2 ~m (10)+3 ~m (0) 5 ~m =4 ~cm y _ com = 2 ~m (0)+3 ~m (15) 5 ~m =9 ~cm r _ com =4 i +9 j

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