About the ads

  1. Check out PREMED.me!
    Offers FREE service to help premeds manage their applications and MCAT study calendars and identify schools to target.

"nonlinear mechanical effect" on a pendulum

Discussion in 'MCAT Study Question Q&A' started by sc4s2cg, Jun 14, 2012.

  1. SDN is a nonprofit organization. Services are made possible through the generous support of SDN members and sponsors. Thank you.
  1. sc4s2cg

    sc4s2cg

    Joined:
    May 24, 2010
    Messages:
    478
    Status:
    Medical Student
    SDN 2+ Year Member

    SDN Members don't see this ad. (About Ads)
    What does that mean?

    PBRI 5.1, #6:

    What is an example of a nonlinear mechanical effect?

    a) Air resistance caused by localized eddies in the evacuated jar
    b) Thermal expansion of the fulcrum due to friction
    c) Induced electrical current in the moving bob
    d) Deformation of the cable caused by centripetal acceleration

    Answer is D, but I am unfamiliar with the terms "nonlinear mechanical effect" and "eddies".
  2. RocketSurgeon

    RocketSurgeon

    Joined:
    Dec 25, 2010
    Messages:
    172
    Status:
    Pre-Medical
    SDN 2+ Year Member
    Linear implies in 2-D an equation the form y = mx + b. If you plot x and y you get a straight line in 3-D you get a plane z = ax + by + c. Google this "plot 3x+4y+4"

    Non-Linear equations have a higher order polynomial term or non linear terms in the equations for example. max operator max(a,b) or y = (x^2):thumbup:.

    Deformation of a cable is non linear because if force x increases by one unit the length y does not increase in the form y = mx + b but in some non linear way for example y = log(x).

    A visual way to think of this is

    Increase -->
    Force : |_|_|_|_|_|_|_|_|_|
    Length : |_|__|___|____|_____|

    Hope this helps

Share This Page


About the ads