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Question 30548
JEE Physics · Hard

Center of Mass, Momentum and Collision: Impulse from Pressure MCQ

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Impulse from PressureHardQuestion 30548

Question

A hose pipe delivers 2 kg/s of water at 10 m/s against a wall (water comes to rest). Force on the wall is:
  1. A
    5 N
  2. B
    10 N
  3. C
    20 N
    Correct
  4. D
    100 N

Correct answer

20 N

Explanation

F = Δp/Δt = rate of change of momentum = mass flow rate × (initial v − final v) = 2 × (10 − 0) = 20 N.

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