1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    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!

Homework Help: Time for a cyclist to stop moving if he stops pedalling

  1. Jan 23, 2012 #1
    1. The problem statement, all variables and given/known data

    If the rider stops pedalling calculate the distance traveled by the bicycle before it comes to rest from an initial speed of 2m/s.

    Mass of rider: 60kg
    Mass of bicycle: 7 kg
    Drag: 7.5 V^2 (where V is the velocity)
    Slope : 10°

    3. The attempt at a solution

    F= ma
    -7.5V^(2) - sin10° mg = ma to find the deceleration

    however I know that the drag decreases with the decrease in velocity, hence the deceleration is not constant! I think I should use some sort of integral! HELP!!!!

    sorry guys I found the formula I was looking for derived by my lecturer!!
    Last edited: Jan 23, 2012
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted