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The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 55600 N. The lift force generated by the rotating blade makes an angle of 21.0° with respect to the vertical.

(a) What is the magnitude of the lift force?

(b) Determine the magnitude of the air resistance that opposes the motion.

  • physics - ,

    The lift force L has an x and y component Lx and Ly:

    Lx = Lsin21
    Ly = Lcos21

    In the y direction,

    Lcos21 - 55600 = 0

    Solve for L

    In the x direction

    Lsin21 - Fair = 0

    where F air is the force of air resistance

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