Discussion Forum : Physics
Question -
Water jet issues water from a nozzle of 2 `cm^2` cross-section with velocity 30 cm/s and strikes a plane surface placed at right angles to the jet . The force exerted on the plane is .
Answer: Option C
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`because` `F = (Delta P)/(Delta t) = v (Delta m)/(Delta t)`
= `pAv (Delta x)/(Delta t)`
= `pAv ((v Delta t)/(Delta t))` = 1 x 2 x `(30)^2`
= 1800 dyne.
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