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!

Basic physics homework question

  1. Sep 10, 2007 #1
    1. The problem statement, all variables and given/known data

    Question #1:


    Solve for: a

    Question #2:

    E= ½ m * v²
    Solve for: v

    2. Relevant equations

    v = Δd / Δt
    a = v² - v¹ / Δt
    v² = v¹ + a * Δt
    Δd = (v² - v¹) * Δt
    Δd = v¹ * Δt + ½ a ( Δt )²
    E= ½ m * v²

    3. The attempt at a solution

    I'm not sure how to resolve this one.
  2. jcsd
  3. Sep 10, 2007 #2


    User Avatar
    Homework Helper

    Just solve for a in the first equation... just like normal algebra... rearrange the equation etc...
  4. Sep 10, 2007 #3


    User Avatar

    Staff: Mentor

    One needs to be consistent.

    This equation assumes constant acceleration, and t would be the elapsed time from application of the acceleration. v1 would normally the initial velocity (or speed) at the reference time, and d would be the distance at time t.

    See this - http://hyperphysics.phy-astr.gsu.edu/hbase/mi.html



    As learningphysics indicated, one can solve algebraically for the variables or coefficients in terms of variables and other coefficients.
    Last edited: Sep 10, 2007
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Basic physics homework question
  1. Basic Physics Homework (Replies: 1)