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Q5.27 A helicopter of mass 1000 kg rises with a vertical acceleration of 15 m s-2. The crew and the passengers weigh 300 kg. Give the magnitude and direction of the

(b) action of the rotor of the helicopter on the surrounding air,

Answers (1)


(b) In this case, we need to consider helicopter and passengers in a system because we need to determine the action of the rotor.

        So by Newton's laws motion, we have :

                                                    R\ -\ mg\ =\ ma

or                                                 R\ =\ ma\ +\ mg

or                                                        =\ 1300\left ( 15+10 \right )

or                                                        =\ 32500\ N

The direction of the force of rotor on the surrounding will be in the downward direction.

Posted by

Devendra Khairwa

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