NEET 2016 Phase 2 · PhysicsImpulsePrevious Year Question
A rigid ball of mass m strikes a rigid wall at 60° and gets reflected without loss of speed, as shown in the figure. The value of the impulse imparted by the wall on the ball is:
Answer: (A) mV. Correct Answer (A) Solution: Only the velocity component perpendicular to the wall reverses; the parallel component is unchanged.
- A.mV✓
- B.2mV
- C.mV/2
- D.mV/3
Correct Answer
(A) mV
Solution & Explanation
Correct Answer (A) Solution: Only the velocity component perpendicular to the wall reverses; the parallel component is unchanged. From the figure that normal component is V cos60°. Impulse = change in normal momentum = 2mV cos60° = 2mV(½) = mV.
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