Answer: 25 m/s
Step-by-step explanation:
Use formula acceleration = velocity final - velocity initial divided by time
A = 7 m/s^2
Vf = 60 m/s
Vi =
t = 5 sec
7 = 60 - x/5
Multiply both sides by 5
35 = 60 - x
Subtract 60 from both sides
-25 = -x
x = 25
Vi = 25 m/s