NEET 2023 Phase 2 · PhysicsImpulsePrevious Year Question
A 1 kg object strikes a wall with a velocity of 1 m/s at an angle of 60° with the wall and reflects at the same angle. If it remains in contact with the wall for 0.1 s, the force exerted on the wall is:
Answer: (A) 10√3 N. Correct Answer (A) Solution: Normal component = v sin60° = √3/2 m/s; only it reverses.
- A.10√3 N✓
- B.20√3 N
- C.30√3 N
- D.Zero
Correct Answer
(A) 10√3 N
Solution & Explanation
Correct Answer (A) Solution: Normal component = v sin60° = √3/2 m/s; only it reverses. |Δp| = 2mv sin60° = 2×1×(√3/2) = √3 kg·m/s. Force = Δp/Δt = √3/0.1 = 10√3 N.
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