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: Calculating force from distance traveled and initial speed of projectile

  1. Oct 20, 2014 #1
    1. The problem statement, all variables and given/known data

    Estimate the average force exerted by a shot-putter on a 7.0-kg shot if the shot is moved through a distance of 3.0m and is released with a speed of 10m/s .
    2. Relevant equations
    Maybe the Five Equations for constant acceleration?

    3. The attempt at a solution
    So my guess is that I need to find acceleration. I tried:

    0=100 m^2/s^2+6m(a)
    (-100 m^2/s^2)/6m=a


    But I was told this is wrong
  2. jcsd
  3. Oct 20, 2014 #2


    Staff: Mentor

    The key to this question, I believe, is the phrase "average force," which is the change in momentum divided by the elapsed time.
    $$\bar{F} = \frac{m(v_f - v_i)}{\Delta t}$$
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted