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: Homework help needed!

  1. Feb 25, 2009 #1
    A jet pilot takes his aircraft in a vertical loop

    a. If the jet is moving at a speed of 1300 km/h at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.7 g's.

    b. Calculate the 75-{\rm kg} pilot's effective weight (the force with which the seat pushes up on him) at the bottom of the circle, and at the top of the circle (assume the same speed).

    I need much help! This is one of only 2 problems I can not figure out. Due in one hour.
  2. jcsd
  3. Feb 25, 2009 #2


    User Avatar
    Homework Helper

    For part (a), you must use the centripetal force formula
    F = m*(v^2)/r
    Replace F with ma.
    Convert your speed into m/s.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook