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!

Projectile motion missle

  1. Nov 11, 2014 #1
    1. The problem statement, all variables and given/known data
    A missle is fired vertically up from a ground with an initial velocity of 20m/s. The acceleration at any time is given by dv/dt = -10 + t/2 m/s^2.
    Find the height of the missile after two seconds
    Find the height after four seconds
    the direction the missile is traveling when t = 4

    2. Relevant equations
    Displacement = x
    Velocity = dx/dt
    acceleration = dv/dt

    3. The attempt at a solution

    dv/dt = -10 + t/2 m/s^2
    dx/dt = -10t + t^2/4 + c

    found c to be 20

    x = -5t + x^3/12 + 20t + c

    when t = 0 displacement = 0
    c = 0

    -5t + x^3/12 + 20t

    then I don't know what to do
     
  2. jcsd
  3. Nov 11, 2014 #2
  4. Nov 11, 2014 #3

    SteamKing

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Please don't make multiple posts of the same HW problem in different forums. It's against the rules of PF and I just wasted time answering your duplicate thread in the Calculus HW forum.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Projectile motion missle
Loading...