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Acceleration of a block

  1. Jun 2, 2012 #1
    1. The problem statement, all variables and given/known data

    Okay, i am preparing for an exam so the questions i am doing are only for my learining they will not be marked anyway

    I already know that the answer is C) 0.5ms-2

    what i need is an explanation, i don't understand how that answer was derived...

    I thought it would be 6N but that wasn't an option

    The question is an image attached
     

    Attached Files:

  2. jcsd
  3. Jun 2, 2012 #2
    Why do you think would it be 6N? Did you form up the force equations?

    Please show your work. :smile:
     
  4. Jun 2, 2012 #3
    Oh *Face palm* its complicated to explain but i thought this question was asking something else. i now realize how utterly simple it is..

    acc= 6/12 nd thats why it's 0.5.. OKay... So how do i know it was going downwards?

    wouldn't it be 0.5 upwards since teh number is positive? Btw i have many more questions so if your gonna stick around i i have alot more to ask..
     
  5. Jun 2, 2012 #4
    It doesn't matter what the sign is, what matters is which way you take your coordinate system. Now the bigger force is obviously acting downwards. So...there ya go :wink:
     
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