As the plane sits on the runway, you take a wad of gum from your mouth, tie a string to it and hang the thing like a pendulum from the seat back in front of you.
When the plane begins to accelerate down the runway, the gum pendulum makes an angle θ = 12 degrees from vertical as shown in the diagram.
The takeoff speed of the plane is 76 m/s.
How long is the runway?

Question

As the plane sits on the runway, you take a wad of gum from your mouth, tie a string to it and hang the thing like a pendulum from the seat back in front of you.
When the plane begins to accelerate down the runway, the gum pendulum makes an angle θ = 12 degrees from vertical as shown in the diagram. 
The takeoff speed of the plane is 76 m/s.
How long is the runway?

amistre64 · Answer

wouldnt you be kicked of the flight?

anonymous · Answer

you could call this experiment "project runway"

amistre64 · Answer

"words with friends" the sequel

anonymous · Answer

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tan(12)*9.81 = acc. of plane