Physics

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if a ball is thrown vertically into the air, leaving the ground at a height of 1.8m, with a speed of 9.7m s -1. When it rises and falls to the ground what will the balls speed be as it hits the ground? please help with an explanation as i am so stuck, my exam is in two days and i need help.
thanx
Becky

  • Physics -

    I would do this with energy.

    Final total energy=initial total energy

    1/2 m vf^2+zeroPE=mg(hi)+1/2 mvi^2

    Vf^2=2g*1+vi^2

    you may have had this formula presented to you for memory as..
    Vf^2=Vi^2+2ad

  • Physics -

    Thank you Bob Pursley :)

  • Physics -

    Penejoldo

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