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: Projectile: Vertical height

  1. Sep 1, 2011 #1
    1. The problem statement, all variables and given/known data

    A baseball is thrown with an initial velocity of 20 ms at an angle of 30 degrees with the horizontal. How high did it go if it was released and caught 2 meters from the ground?

    2. Relevant equations

    3. The attempt at a solution

    0=Vi^2 + 2ad
    0=(20Sin30)2 + 2 X (-9.8)d
    d=5.0m, but this is wrong.... Would I mabey need to add 2m to my answer beacuse it is projected from a 2m height? therefore it will go 7m??
  2. jcsd
  3. Sep 1, 2011 #2


    User Avatar
    Homework Helper

    Adding the 2 would be a very good idea , yes

    EDIT: you did round off quite a bit to get 5.0m too. That is the answer you get if you take g = 10
  4. Sep 1, 2011 #3
    I know... I got 5.10m, whihc would give 7.1m..... I think my teacher sometimes uses 10 or 9.81 depends what kind of day it is ;-), lol
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook