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!

AS Physics Kinematics Question

  1. Oct 18, 2011 #1
    1. The problem statement, all variables and given/known data
    All included in image provided. As you can see, it's a multi-choice qu


    2. Relevant equations
    Acceleration=Velocity/Time
    Not sure what else...

    3. The attempt at a solution
    Uncertain about how to approach this question. Using SI units I eliminated B. Any help would be appreciated. Thanks :D
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Oct 18, 2011 #2

    cepheid

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Are you aware of a kinematics equation (for constant acceleration) that relates distance travelled to acceleration and time?
     
  4. Oct 18, 2011 #3
    s=1/2at^2 when the initial velocity=0
     
  5. Oct 18, 2011 #4

    PeterO

    User Avatar
    Homework Helper

    Note that this is a multiple choice question.
    You don't have to find the answer, you only have to find which one of these answers is the answer.

    Your experience should tell you that an object falling on Earth [approximating g = 10] will fall to 5m in one second and to 20m in 2 seconds - an extra 15m.

    This if a = 10, x = 5 and h = 15 then t1 = 1 and t2 = 2.

    Substitute those values in and only one of the options will yield the correct answer.

    I repeat - to emphasise:

    This is a multiple choice question.
    You don't have to find the answer, you only have to identify which one of the offered answers is the correct.

    Alternately you can work with the equation you identified and derive the solution.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: AS Physics Kinematics Question
Loading...