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Bike race problem

  1. Jun 16, 2011 #1
    1. The problem statement, all variables and given/known data

    Contador climbs a 5 degree section of road for 8.2 km to the summit in 20 minutes 35 seconds. he is 62kg?
    his bike is 8kg and the resistance force is 21 N
    What is the applied force needed for contador to move at constant speed?
    what is the work done to reach the summit?
    how much power does contador generate per kilogram of body mass?
    how much additional force is needed if contador accelerates at a rate of .62 m/s^2 for the last 25 seconds?
    with what velocity does he finish the race based on this acceleration?

    2. Relevant equations

    ke= .5 mv^2
    pe=mgh
    work=fd
    power= delta E/time


    3. The attempt at a solution
     
  2. jcsd
  3. Jun 16, 2011 #2

    Mark44

    Staff: Mentor

    What are your thoughts on this problem? Per Physics Forums rules, you need to show some effort towards a solution before we can give help.
     
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