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Stuck on some Physics, help please (Work and Energy)?

  1. Nov 3, 2009 #1
    Stuck on some Physics, help please!! (Work and Energy)?

    K this first one im not sure how to do it.. i did the second part, thats because i had all the variables but in this one i dont...

    ok this is about skeleton racers... the track total height is 104m, in the absence of nonconservative forces, such as friction and air resistance, what would be the speed of a rider at the bottom of the track? ignore initial velocity since its relatively small.

    and

    In 2.0min a ski lift raises four skiers at constant speed to a height of 140m. the average mass of each skier is 65kg. what is the average power provided by the tension in the cable pulling...

    i know what to but i just cant figure out the Work... i know that power = work/time.. so if i could get some help that would be greatly appreciated!
     
  2. jcsd
  3. Nov 3, 2009 #2
    Re: Stuck on some Physics, help please!! (Work and Energy)?

    can someone please help me understand these two problems??
     
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