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: Velocity Acceleration and Displacement

  1. Oct 3, 2009 #1
    1. The problem statement, all variables and given/known data

    Hi am a physics beginner love it but seem to have issues with understanding Linear motion .. Anyway i have a question ..will be glad if could help .
    " A car moves along a road in such a way that the distance x ,traveled in a time t ,is given by x=a+bt(to the power 3) where A and B have constant values of 3.5m and 2.5ms-3 respectively .
    Derive expressions for the velocity and acceleration as a function of time and calculate the values of displacement ,velocity and acceleration at t=2.0s .
    Then draw a rough sketch to show how the velocity and acceleration vary with time..
    Thanks ...

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Oct 3, 2009 #2


    User Avatar
    Homework Helper

    ok so you know that x=A+Bt3 and you are given A and B, now write down the equation of x with A and B with their respective values.

    How do you find velocity when given displacement as a function of time? (i.e. what is the relation between velocity, displacement and time?

    Similar for acceleration.

    EDIT: Read up on http://en.wikipedia.org/wiki/Kinematics" [Broken]
    Last edited by a moderator: May 4, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook