SDN members see fewer ads and full resolution images. Join our non-profit community!

BR chapter 1, #17 in 52 q test: mass vs acceleration

Discussion in 'MCAT Study Question Q&A' started by PREMED501, Jan 15, 2014.

  1. PREMED501

    PREMED501 5+ Year Member

    Dec 1, 2011
    I'm having trouble reconciling the fact that mass and acceleration are unrelated in kinematics problems yet inversely proportional when talking about force/f=ma. Problem 17 in 52 question test in chapter 1 of BR says they are unrelated when an object is pushed up air ramp, etc. can someone please explain this question and answer to me
  2. SDN Members don't see this ad. About the ads.
  3. brood910

    brood910 2+ Year Member

    Jul 21, 2011
    On the ramp = F = mgsin, assuming no frictional force.
    Then, ma = mgsin, where m cancels out. Mass does not affect acceleration.
    You should write out all the forces present and set them equal to ma to see what affects a.

    p.s. I didnt look at the problems. This is just a basic fact regarding ramps.
  4. pjk77


    Oct 20, 2013
    yep. even if frictional force, you'll get mgsintheta- ukmgcostheta= mg and m cancels all the way through.

Share This Page