tennisball mashine shoots a ball straight up in the air, it lands after 7 seconds What's the hight of the ball given v=f(t)=30-10t
i figured that the equation i got is actually the derivative of -5t^2+30t
ball shots upp with a velocity of 30m/s, is a physics mix i have no pheta angle neede to solve it in a simpler way...vertex apex
im asked: what does 30 stand for? -10t?acceleration?
and what's max height?
i have a graf with and dowsslopping linear line crossing the y axis at 30m/s and the x axis at 3 seconds

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ok tell me V=30-10t did they give you this with question

oh ok now i can solve it

is the answer 35 feet

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