Anonymous
Anonymous asked in Science & MathematicsPhysics · 2 months ago

The landing speed of an airplane is 360 kph. When it touches down, it puts on its brakes and reverses its engines. The retardation in....?

Cont..

its speed is 0.2 times the square root of its speed. Determine the length of runway in meters it will travel from the point of touchdown until it comes to a complete stop.

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  • NCS
    Lv 7
    2 months ago

    Solution in image.

    Attachment image
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    • NCS
      Lv 7
      1 month agoReport

      https://www.wolframalpha.com/input/?i=v+%3D+100+-+2t+%2B+0.01t%C2%B2+for+0%3Ct%3C100

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  • Vaman
    Lv 7
    2 months ago

    Assume dv/dt=-0.2 sqrt v. Integrate it

    1/sqrt v dv/dt =- 0.2,  2 v^1/2=0.2t +c. Now find the time t0.

    1/2 v^1/2 -1/2 v0^1/2= 0.2 t -1.2 t0. to is the landing time and can be put as 0. v0 is the landing velocity. Final velocity is 0. t= 1/2*10/2 sqrt V0. time t total= 5/2 sqrt Vo. I will try to complete it later.

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  • Anonymous
    2 months ago

    You have mental retardation

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