What does itmean to have an acceleration of 8 m/s2 A. You speed up 8 m/s every second.
B. You travel 8 meters every second.
C. You slow down 8 m/s every second.
D. You travel 8 meters every other second.

The answer is option A.

You speed up 8 m/s every second

Hope this helps you

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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