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Quick Projectile Question

  1. Dec 16, 2005 #1
    If two objects are fired, both from a height h and speed v0, where object A is fired at an angle θ with the horizontal and object B is fired at an angle of 2θ, which will land with a greater speed?

    It seems to me that the speed would be the same for both, although the velocity vectors would differ in their x- and y-components. Is my answer correct? The question asks to explain this without any equations, so I am having trouble justifying it. Any ideas? Thank you.
  2. jcsd
  3. Dec 16, 2005 #2


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    HINT: Energy is conserved! :)
  4. Dec 16, 2005 #3
    So if I use y=0 as my reference point and y=h as the launching point, I can say that:

    Object A:


    Object B:


    Then vA must equal vB. Is this correct?
  5. Dec 16, 2005 #4


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    Yes, and you can even say that without using equations! :)
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