p(t) = 200m -(4.9 m/s2) t2
it gets simplified, but im stuck on how to go further below,
= -4.9t21 + 4.9t20 this is being divided by the way, so what is the simplified formula i can use ?
t1 - t0
Your expression gives the velocity integral. To get the average, Divide this by t1-t0
i.e. vave = 4.9(t02-t12)/(t1-t0) → 4.9(t0-t1)(t0+t1)/(t1-t0) → -4.9(t0+t1) m/s