Question
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 )
NEET
Physics
Center of Mass Momentum and Collision
2025
NEET 2025
NEET Physics Question (2025) — Solution
Options
- A. 21 NS
- B. 7 NS
- C. 0
- D. 84 NS
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
Related: Physics — Center of Mass Momentum and Collision · All PYQ Banks