A ball is traveling at 60m/s, then increases to 90m/s in 3 second, what is the average velocity?

75 m / s

Explanation:

Acceleration of ball a = change in velocity / time

= (90 - 60) / 3 = 10 m s⁻²

Initial velocity u = 60 m/s

a = 10 m s⁻²

time t = 3

distance traveled s = ut + 1/2 at²

= 60 x 3 +.5 x 10 x 3 x 3

= 225 m

Average velocity = total distance traveled / time

= 225 / 3 = 75 m/s