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Need help with a force vs time graph.

  1. Nov 30, 2007 #1
    [SOLVED] Need help with a force vs time graph. :(

    1. The problem statement, all variables and given/known data
    Which interval in Fig. MC3 corresponds to the greatest change in the speed of the body?
    Figure MC3 is above.

    a) 1-2s
    b) 0-1s
    c) 2-3s

    2. Relevant equations


    3. The attempt at a solution

    I figured out that 1-2s has the greatest slope of the three, would that indicate that it has the greatest change in speed? It seems logical to me but I don't really understand this graph, so I don't want to guess and get the wrong answer (this is my last try to get it right). It seems like it would be really simple.

    Attached Files:

  2. jcsd
  3. Nov 30, 2007 #2


    User Avatar

    Staff: Mentor

    Wrong. What is the fundamental equation that relates force, mass and acceleration?
  4. Nov 30, 2007 #3
    berkeman has it quite correct. Look at the relationship between force and rate of change of velocity (acceleration).

    P.S. strictly this should be rate of change of momentum, but I won't confuse the issue ;-)

    Edit: also, are you sure that the 1-2 second interval has the highest slope (gradient)? Look carefully.
    Last edited: Nov 30, 2007
  5. Nov 30, 2007 #4
    Thank you. :) solved
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