Please indicate how long each bar is in centimeters and millimeters.

Explanation:

1- 9 cm = 90 mm

2- 94 cm = 940 mm

3- 27 cm = 270 mm

4- 87 cm = 870 mm

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 -