(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

going through my a level text i found a prob i cannot solve

2. Relevant equations

1) a helicopter of total mass 1000kg is able to remain in a stationary position by imparting a uniform downward velocity to a cylinder of air below it of effective diametre 6m. Assuming the density of air to be 1.2 kg/m^3, calculate the downward velocity given to the air

3. The attempt at a solution

m=1.2*28.27= 33.92 kg

-m2a2=m1a1

stuck i know the ans is 17.2 m/s but i dont know how to get it

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# Difficulty solving problem

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