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NEET2025PhysicsCenter of Mass, Momentum and CollisionActual

A ball of mass 0.5 kg is dropped from a height of 40 m . The ball hits the ground and rises to a height of 10 m . The impulse imparted to the ball during its collision with the ground is (Take g =9.8 ~m / s ^2 )

Options

  1. A21 NS
  2. B7 NS
  3. C0
  4. D84 NS

Correct answer

A. 21 NS

Step-by-step solution

aligned v_i & =- 2 gh _i =- 2 9.8 10 =-28 ~m / s v _ f & = 2 gh _ i = 2 9.8 10 =14 ~m / s I & = P = m v _ f - m v _ i & = m [ v _ f - v _ i ]=0.5[14-(-28)] & =0.5 42=21 NS aligned

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