1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

A man of mass 70kg rides a bicycle of mass 15kg at a steady speed of 4

  1. Oct 24, 2011 #1
    1. The problem statement, all variables and given/known data

    a man of mass 70kg rides a bicycle of mass 15kg at a steady speed of 4 ms-1 up a road which rises 1.0 m for every 20m of its length. what power is the cyclist developing if there is a constant resistance to motion of 20N

    2. Relevant equations

    (P= F*V) , ( p= W/t)

    3. The attempt at a solution
  2. jcsd
  3. Oct 24, 2011 #2


    User Avatar
    Homework Helper

    Re: power

    I suggest you work with a distance of 20 m. Figure out the height and potential energy gained over that distance. Figure out the time it takes to go 20 m. Then you will be in a position to use one of your power formulas.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - mass 70kg rides Date
Finding the Mass of a Hanging Rope (Wave Problem) Friday at 6:38 PM
Deriving relativistic mass Wednesday at 10:38 AM
Charges of ions in a mass spectrometer Mar 7, 2018
Center of mass of a disk with a hole Mar 1, 2018