Physics A level

A Ball is thrown vertically upwards and reaches its maximum height 2.0s later.
a)WHat is the intitial velocity of the ball?
b)What is the maximum height that the ball reaches?

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  1. at the top, vertical velocity is zero
    vf=vi+gt
    g=-9.8m/s^2, t is given, solve for vi
    maxheight=vi*t+hi+1/2 g t^2 hi=0 solve for maxheight

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