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KVPY2015PhysicsCenter of Mass, Momentum and Collision

A rigid body in the shape of a "V" has two equal arms made of uniform rods. What must the angle between the two rods be so that when the body is suspended from one end, the other arm is horizontal?

Options

  1. A⁻¹ ( 1 3 )
  2. B⁻¹ ( 1 2 )
  3. C⁻¹ ( 1 4 )
  4. D⁻¹ ( 1 6 )

Correct answer

A. ⁻¹ ( 1 3 )

Step-by-step solution

m₁ r₁+m₂ r₂=0m r₁=m r₂r₁=r₂ l 2 = l 2 -l 3 l 2 = l 2 = 1 3

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