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Physics · LAWS OF MOTION
हिन्दीA stream of water flowing horizontally at a speed of \( 15\text{ m/s} \) pushes against a rigid vertical wall at a steady rate of mass flow equal to \( 20\text{ kg/s} \). Assuming the water comes to rest immediately after striking the wall without rebounding, the force exerted by the water stream on the wall is:
Correct answer · Option A
300 N
Explanation
By Newton's second law, \( F = \frac{dp}{dt} = v \frac{dm}{dt} = 15 \times 20 = 300\text{ N} \).
