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Homework Help: SUVAT Question

  1. May 16, 2012 #1
    Hi, i'm just practicing some SUVAT style questions as part of my revision and have a quick question.

    Here's an example, a ball is catapulted vertically upwards at 10m/s, find the time it takes to hit the ground.(Discount air resistance)

    I used S =0 U=10 m/s V=? A=-9.8 T=?

    Using v =u +at gave me a time of 1.02s however this is wrong.

    Is this because i've done this as one motion? Should I split it into to, ie find highest position then journey back down?


    Just to reiterate this isn't a homework question.
  2. jcsd
  3. May 16, 2012 #2
    The ball goes up and the ball returns to the ground. So double the time it takes to attain a velocity of 10 m/sec if dropped.

    Or solve the following:

    d = Vo*t + .5 * a * t^2

    where d=0.0, Vo=10. m/sec, and a = -9.81 m/sec^2
  4. May 16, 2012 #3
    What is value of V?
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