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!

Energy, Grabity and Calculating Net Force of a Diver

  1. Jan 27, 2010 #1
    1. The problem statement, all variables and given/known data
    A 60.0-kg person, standing on a diving board, dives straight down into the water. Just before striking the water, her speed is 6.50 m/s. At a time of 1.75 s after entering the water, her speed is reduced to 1.10 m/s. What is the average net force (magnitude and direction) that acts on her when she is in the water?

    2. Relevant equations
    Kinematics Equations

    3. The attempt at a solution
    I multiplied the mass times gravity (9.8) and get the downward force. I used 6.5 as the initial velocity and 1.1 as final velocity. Then deacceleration can be calculated. But i don't know where to go from here.
  2. jcsd
  3. Jan 27, 2010 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    You know the acceleration as she goes through the water and you know her mass. Can you find the net force acting on her from this information?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Energy Grabity Calculating Date
Kinetic Energy Needed for Proton Acceleration Yesterday at 10:03 AM
Kinetic energy as seen from a different frame Yesterday at 12:06 AM
Conservation of momentum & energy Tuesday at 6:55 PM
What does W=VIt show? Tuesday at 9:20 AM
Calculating the angle of a bus driving off a cliff Sunday at 6:36 AM