Question

i hate math...=( help again

Answer 1

no one huh lol

Answer 2

Acceleartion is the rate of change of the velocity, so we need to calculate how much the velocity changes over a period of time.

The total change in velocity is from -16 to +16.

For b) the time interval is 22.5 - 7.5 = 15 so the average acceleration is
32/15 m/s2

For c) the time interval is now 30 seconds so the total acceleration is
32/30 = 16/15