Dismiss Notice
Check out the new Application Assistant, where you can calculate your LizzyM score, see how you rank compared to other applicants, and see a list of schools where similar students were accepted.

Mcat pendulum question~~

Discussion in 'MCAT Study Question Q&A' started by johnwandering, 04.18.12.

  1. SDN is made possible through member donations, sponsorships, and our volunteers. Learn about SDN's nonprofit mission.
  1. johnwandering

    johnwandering 5+ Year Member

    Joined:
    05.18.09
    Messages:
    429

    SDN Members don't see this ad. About the ads.
    A pendulum consists of an object of mass m = 1.65 kg swinging on a massless string of length l. The object has a speed of 1.97 m/s when it passes through its lowest point. If the speed of the object is 0.87 m/s when the string is at 70° below the horizontal, what is the length of the string?

    The relavent info is
    Ek= 1/2 mv^2
    Ep= mgh
     
  2. SDN Members don't see this ad. About the ads.
  3. bajoneswadup

    bajoneswadup

    Joined:
    03.26.11
    Messages:
    147
    Status:
    Pre-Medical
    I'm just guessing, but wouldn't you find energy change and
    divide that by the ac, since ac = tension? could be wrong
     
  4. dmf2682

    dmf2682 Banned 2+ Year Member

    Joined:
    05.29.11
    Messages:
    1,295
    Status:
    Pre-Medical
    Rocket
    Scientist
    I get roughly 1.6 m without using a calculator. What are the choices?
     

About the ads

Share This Page