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    the mir space station has a mass of 20900 kg and orbits the earth at 350 km where the gravitational acceleration is 8.8ms-2

    calculate the centripetal force (done this its 184 kN)

    calculate the speed at which it orbited??

    thanks
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    a = v²/r

    (remembering r = radius of earth + orbital height)
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    (Original post by elpaw)
    a = v²/r

    (remembering r = radius of earth + orbital height)

    opps forgot to add th radius of earth! thanks alot
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    (Original post by sarah12345)
    the mir space station has a mass of 20900 kg and orbits the earth at 350 km where the gravitational acceleration is 8.8ms-2

    1.) calculate the centripetal force (done this its 184 kN)

    2.) calculate the speed at which it orbited??

    thanks
    1.) Centripetal Force = mg = 20900 * 8.8 = 183, 920 N
    2.) Speed (Orbit) = Sqrt (ar) = Sqrt {8.8 * [350 * 10^3 + 6400 * 10^3]} = 7707 ms^-1
 
 
 

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