Superman is flying and slows from a velocity 60 m/s to a velocity of 30 m/s in 300m. What is his acceleration? а
-0.1 m/s/s
-4.5m/s/s
b
-9m/s/s
d
-1.0m/s/s

a = - 4.5 [m/s²]

Explanation:

To solve this problem we must use the following equation of kinematics.

where:

Vf = final velocity = 30 [m/s]

Vo = initial velocity = 60 [m/s]

x = distance = 300 [m]

a = acceleration [m/s²]

Now replacing:

0.19 m/s and 0.45 m/s