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Homework Help: 2D Motion, Physics, Need help

  1. Jan 6, 2010 #1
    An object is projected horizontally with an initial velocity of 3.0m/s

    A) When will the vertical displacement be 5.0m
    B) What will the horizontal displacement be at this time

    Have difficulty's with A
  2. jcsd
  3. Jan 6, 2010 #2


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    Homework Helper

    Consider vertical components and then use the equations of motion.
  4. Jan 6, 2010 #3


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    Gold Member

    You can use the kinematic equations in the vertical direction, once you know the value of the downward acceleration in the vertical y direction and the initial velocity in the y direction. Identify these values as 'givens', then which of the kinematic equations would you choose?
  5. Jan 6, 2010 #4
    i was getting really close but not quite but i just realised that there is only one sig fig,
    so when i round it i get the right answer
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