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Another question on 'retarding force'

  1. Nov 20, 2004 #1
    I have question to ask on retarding force and I just can't figure out the answer.

    The question is in my attachment.

    In the attachment,I didn't write out my solution because I totally blure with the question ask.

    I hope that someone will help me by explain to me what the question want and some information on this question.I hope somebody will suggest me which website can I refer to but not solve the question for me.Thank you !

    Attached Files:

  2. jcsd
  3. Nov 20, 2004 #2
    Write down everything you're given. How does the retarding force relate to gravity if the speed is constant? Given the kinetic energy is 1/2 m*v^2, I think you can use simple substitution to get your answer.
  4. Nov 20, 2004 #3
    The word 'steady v' is the crucial key to your final answer.
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