1. Not finding help here? Sign up for a free 30min 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!

Mechanics Projectile Questions

  1. Jan 15, 2008 #1
    1. The problem statement, all variables and given/known data
    At time t = 0 a particle is projected horizontally from a point A with position vector (5i + 30j)m. It passes through point B with position vector (17i +10.4j)m. Find:
    - Its speed of projection
    - Time taken to travel from A to B

    2. Relevant equations

    s = ut + 0.5at²

    v² = u² + 2as

    v = s / t

    a = (v - u) / t

    v = s / t
    3. The attempt at a solution

    Well from A to B the i and j components are

    12i
    -19.6j

    i can draw a right angled triangle and use pythagerous's thyrom and calculate that the other side is 12.8 (3.s.f) - is that meters?

    Have i gone the right way. I don't know what to do now. Any hints
     
  2. jcsd
  3. Jan 15, 2008 #2
    Ahh i worked out the verticle component and got t = 2

    now...
     
  4. Jan 15, 2008 #3
    then put this into v = s / t

    v = 6m/s and t = 2s

    yeh :)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Mechanics Projectile Questions
  1. Projectile Motion (Replies: 1)

Loading...