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Math Help - How to find the horizontal displacement when only the angle given?is that possible?

  1. #1
    Junior Member silvercats's Avatar
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    How to find the horizontal displacement when only the angle given?is that possible?

    object is projected with a V m/s velocity.its maximum horizontal range is 2h.Also what is the horizontal range when projected angle is (|)30 degrees (||) 60 degrees?
    object is projected with a V m/s velocity.its maximum horizontal range is 2h
    fine.it can be done.
    x=vēsin 2Θ/g
    because 2h is maximum,its angle has to be 45.
    so Θ=45
    x=vē/g
    2h=vē/10
    v=√20h

    But! How am I supposed to Find the velocity when only the angle is given like that?????
    it can't be same V as before because that V is for 45 degree angle,right?
    help!
    Thanks
    Last edited by silvercats; May 27th 2011 at 10:43 PM.
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  2. #2
    Senior Member abhishekkgp's Avatar
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    Quote Originally Posted by silvercats View Post
    object is projected with a V m/s velocity.its maximum horizontal range is 2h.Also what is the horizontal range when projected angle is (|)30 degrees (||) 60 degrees?


    fine.it can be done.
    x=vēsin 2Θ/g
    because 2h is maximum,its angle has to be 45.
    so Θ=45
    x=vē/g
    2h=vē/10
    v=√20h

    But! How am I supposed to Find the velocity when only the angle is given like that?????
    it can't be same V as before because that V is for 45 degree angle,right?
    help!
    Thanks
    yes you have to take it V for 30 and 60... otherwise the question is incomplete.
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  3. #3
    Junior Member silvercats's Avatar
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    Is that so really?I thought so too.thanks for replying
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