How is velocity different from speed? a- velocity is based on distance. b- velocity includes direction. c- velocity can be an average or instantaneous.

B. Velocity includes direction.

Explanation:

edgenuity2020

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 -

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more