Question #69141
The rotor blades of a helicopter propel 2500kg of air vertically downwards every second. The air, initially at rest, is accelerated to a speed of 15 m/s. If the helicopter starts to rise with an acceleration of 12.5 m/s, what is the mass of the helicopter?
1
Expert's answer
2017-07-04T10:17:06-0400
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