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: Could someone check my work on this vector assignment question?

  1. May 18, 2014 #1
    Would anyone willing to check my work on this vector question?

    I have an assignment due in a few days and was just wondering if someone could look over one of the questions from this assignment and see if I've done it correctly, as I still don't feel entirely confident with this yet.

    So the question is: A baseball, thrown from the ground, lands on top of a building that is 15.5 m tall. If the ball is thrown at 22.0 m/s at an angle of 58.0° above the horizontal, find each of the following:

    a) horizontal and vertical components of initial velocity

    Vo= 22.0 m/s, so Voy=22sin(58)=18.7 m/s, and Vox=22cos(58)=11.7 m/s

    b) final vertical velocity

    = 18.7^2 + 2(-9.8)(15)
    = +/- sqrt(55.69)
    Vfy = -7.46 m/s

    c) time of flight

    a=v/t therefore t=v/a
    t= -7.46-18.7/-9.8
    t= 2.67s

    d) horizontal displacement


    e) final vector velocity (HINT: Use both vertical and horizontal components)

    Vf^2 = Vfy^2+Vfx^2
    Vf=-13.88 m/s

    f) maximum height reached above the ground
    Set Vfy=0
    Last edited: May 18, 2014
  2. jcsd
  3. May 18, 2014 #2
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted