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NEET2009PhysicsCenter of Mass, Momentum and CollisionActual

An explosion blows a rock into three parts Two parts go off at right angles to each other. These two are, 1 ~kg first part moving with a velocity of 12 ~ms ⁻¹ and 2 ~kg second part moving with a velocity of 8 ~ms ⁻¹ . If the thirds part files off with a velocity of 4 ~ms ⁻¹ , its mass would be :

Options

  1. A3 ~kg
  2. B5 ~kg
  3. C7 ~kg
  4. D17 ~kg

Correct answer

B. 5 ~kg

Step-by-step solution

aligned P ₁+ P ₂+ P ₃ & =0 | P ₃ | & = | P ₁+ P ₂ | m 4 & = P ₁^2+ P ₂^2 & = 12^2+16^2 ~m & =5 ~kg aligned

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