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    really stuck on these questions have no understand on how to even start them. Q5 , Q7 . thanks for the help in advance.

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    (Original post by Secreay)
    really stuck on these questions have no understand on how to even start them. Q5 , Q7 . thanks for the help in advance.

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    draw a diagram

    write down what you know from the question

    F = m\omega^{2} r

    ?
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    (Original post by boner in jeans)
    draw a diagram

    write down what you know from the question

    F = m\omega^{2} r

    ?
    i managed 5,6 but i cannot do 7 at all
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    (Original post by Secreay)
    i managed 5,6 but i cannot do 7 at all
    well, the satellite's undergoing circular motion

    what's the time period of one revolution

    once you know that, what's the angular velocity?

    finish by F = m\omega^{2}r

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    I get 38.1N
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    (Original post by boner in jeans)
    well, the satellite's undergoing circular motion

    what's the time period of one revolution

    once you know that, what's the angular velocity?

    finish by F = m\omega^{2}r

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    I get \frac{1}{3}5\times10^{5} \pi N (524000N)
    er 2pi/24*60*60 ? dont quite understand about the values i need mostly.
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    (Original post by Secreay)
    er 2pi/24*60*60 ? dont quite understand about the values i need mostly.
    F is the gravitational force the satellite feels, m is the mass of the satellite, omega is the angular velocity and r is the radius (remember to include the distance between the satellite all the way to the centre of the planet)
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    (Original post by boner in jeans)
    F is the gravitational force the satellite feels, m is the mass of the satellite, omega is the angular velocity and r is the radius (remember to include the distance between the satellite all the way to the centre of the planet)
    this question makes no sense i mean how do you class the mass and the angular velocity ?
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    (Original post by dashdashdash)
    this question makes no sense i mean how do you class the mass and the angular velocity ?
    well based on what's given in the question

    the mass of the satellite is 1 tonne

    the angular velocity is \dfrac{2 \pi}{24*60^{2}}
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    (Original post by boner in jeans)
    well based on what's given in the question

    the mass of the satellite is 1 tonne

    the angular velocity is \dfrac{2 \pi}{24*60^{2}}
    the book says 38.1N?
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    (Original post by dashdashdash)
    the book says 38.1N?
    my mistake, I forgot to square the angular velocity!

    the book is indeed correct
 
 
 
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