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Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
    • Thread Starter

    Sorry, I'm posting this again because I desperately need an answer and everyone ignored my last post.
    The question is as follows:

    A satellite orbits the Earth once every 97 minutes.

    a) Calculate the angular velocity.
    I've worked this out to be 1.08x10^-3. (I know it should be to 2s.f.)

    b) Calculate the radius of the orbit.
    This is where I get stuck. I have all of the equations in front of me, but I can't figure out how to combine them to have r in the equation without having to know the linear velocity.

    I know that v=(2pi r)/T and v=wr, but when I try to equate them the r just cancels out, and I basically just don't know. It seems like I have to know v to know r, but I also have to know r to know v.

    Any kind of hint is appreciated. Thanks in advance!
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