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Projectile motion

  1. Sep 25, 2007 #1
    A projectile is to be fired so that it just clears an obstacle 80m high at its maximum height.
    [​IMG]
    a) by considering the vertical motion only, calculate the verticle speedand the time taken to reach its maximum height
    b) if the distance between A to B is 100m, calculate the horizontal speed with wich the ball was thrown.
    c) Hence find v and Θ.



    totally stuck at this, any help much appricated.
     
  2. jcsd
  3. Sep 25, 2007 #2

    hage567

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    Have you tried anything? What equations might be used? What can you say about the vertical component of the velocity at maximum height?
     
  4. Sep 25, 2007 #3
    the farthest i got, was putting in the right angle, and as for equations that could be used, i think it may have something to do with - Vvertical= vsinΘ. not entirely sure though.
     
  5. Sep 25, 2007 #4

    hage567

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    That would be the initial vertical velocity (is that a negative sign?). What is the vertical velocity at the instant of maximum height?
     
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