A ball is thrown vertically upward from the ground with an intial speed of 15m/s. How long does it take the ball to reach its max altitude? Determine velocity & acceleration of the ball at t=2s

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The initial velocity=15m/sAt the top its final velocity is 0g=-10m/s^2( I rounded it )t=?use the kinematic equation,Vfinal=Vinitial+gt  and solve for t0=15-10t   t=1.5secThe acceleration is always -10m/s^2To find the velocity at t=2 use the same equationV final=15-10(2)=-5m/sThe negative sign indicates the ball is falling downward.