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Mechanics - Kinematics in one dimension homework help!!!

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    Hi, so i don't know ho to do this question , last question on the paper:

    Q: A partical P is projected vertically upwards and reaches its greatest height 0.5s after the instant projection, Calculate:

    1- The speed of projection of P
    2-The greatest height of P above the point of projection
    It is given that the point of projection is 0.539m above the ground, so
    3-Find the speed of P immediately before it strikes the ground



    I just didn't know what it meant by 0.5s after projection -_-. Someone please help.
    Thank you!!
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    (Original post by afghan-superman)
    Hi, so i don't know ho to do this question , last question on the paper:

    Q: A partical P is projected vertically upwards and reaches its greatest height 0.5s after the instant projection, Calculate:

    1- The speed of projection of P
    2-The greatest height of P above the point of projection
    It is given that the point of projection is 0.539m above the ground, so
    3-Find the speed of P immediately before it strikes the ground

    I just didn't know what it meant by 0.5s after projection -_-. Someone please help.
    Thank you!!
    0.5 seconds after it has been 'thrown' upwards. At the highest point, the velocity will be 0ms^-1. It is moving freely under gravity. See if you can use those pieces of information to do the questions.
 
 
 
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