Sunday
April 20, 2014

Homework Help: Physics

Posted by John on Sunday, April 7, 2013 at 2:45pm.

Platform area = 0.027[m2].
Wind Speed = 7.1[ms-1].
Air Density = 1[kg m-3].
Drag = 0.39[N].
Lift = 1.45[N].
Coeffecient of Lift =
Use three sig. figs. or N/A if no answer.

Platform area = 0.045[m2].
Wind Speed = 5.7[ms-1].
Air Density = 1[kg m-3].
Drag = 0.77[N].
Lift = 1.19[N].
Coeffecient of Lift = 1.63
What is the lift to drag ratio?
Use three sig. figs. or N/A if no answer.

What are the units for Coeffecient of Lift?
[kgm-3]
No units
[Ns]
[N2]
[N]
[ms-1]
[kg]

What are the units for the ratio Lift to Drag?
[Ns]
[kgm-3]
No units
[ms-1]
[kg]
[N2]
[N]

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