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Need some quick help on a physics question

  1. Jan 20, 2005 #1
    If the mass slides down the inclined plane fomr the top, what will the speed be when it reaches the bottom

    so my equation is KE=1/2mv^2

    so 281 J = 1/2 (5) v^2

    Im blanking out on how to cancel out the square aaah thx


    EDIT : I GOT IT THanks
     
    Last edited: Jan 20, 2005
  2. jcsd
  3. Jan 21, 2005 #2

    HallsofIvy

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    You've done the physics, don't let the arithmetic stop you now!
    To "cancel" an operation, use the opposite operation. What is the opposite of squaring?

    Try using a square root!

    If (5/2)v2= 281 then v2= 562/5. Take the square root of both sides.
     
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