A-LevelPhysicsDynamics9702/12 · Feb/Mar 2017 · Q91 Mark
Water flows out of a pipe and hits a wall. [Figure showing pipe, water jet, wall, velocity v, cross-sectional area A] When the jet of water hits the wall, it has horizontal velocity v and cross-sectional area A. The density of the water is ρ. The water does not rebound from the wall. What is the force exerted on the wall by the water?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Aρv
A
Bρv²
A
CρAv
DρAv²
✓ Correct answer
D: ρAv²
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