HELP PLEASE 20 POINTS! If we increase the distance traveled over the same period of time, this will (2 points) decrease the speed increase the speed
decrease the velocity
not affect speed or velocity

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.

read more on -

spectral lines lyman is one set