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!

Homework Help: Applies of F=ma

  1. Jul 6, 2013 #1
    This is my problem,
    ABCD is a lift.

    1-- when the lift not moving i want the T and T1.
    T1= 3mg
    T= 2mg
    Right ?

    2-- when the lift is moving with accelartion a. I want to know the new T and T1.
    Are they
    T1 = 3m(g+a)
    T = 2m(g+a)

    Am i doing it right?
  2. jcsd
  3. Jul 7, 2013 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper

    Please show your reasoning.
    Are the masses not equal then? I don't see that on your diagram.
    You should draw separate free body diagrams for each mass.
  4. Jul 7, 2013 #3
    First mass is m
    Second one is 2m
  5. Jul 7, 2013 #4


    User Avatar

    Staff: Mentor

    That looks right. Just make sure you assign the correct +/- sign to 'a'.
  6. Jul 7, 2013 #5
    Yeah, thank you sir
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted