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: Jumping Problem

  1. Nov 29, 2006 #1
    Surprisingly, very few humans can jump more than 2 feet (0.6 m) straight up. Solve for the time one spends moving upward in a 2-foot vertical jump. Then double it for the "hang time" - the time one's feet are off the ground.
    b) Calculate the vertical height of Michael Jordan's jump when he attains a hang time of a full 1 s.

    t=sqrt(2d/g) =sqrt(2(0.6 m))/9.8 =0.35 s

    Hangtime=0.35 s x 2= 0.70 s

    d=(1/2)gt2=(1/2)(9.8 m/s2)(1.0 s)2= 4.9 m

    Is this correct?
  2. jcsd
  3. Nov 29, 2006 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    you forgot to divide the hang time by 2 in part b. part a is a ok.
    Last edited: Nov 29, 2006
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook