Answer:
-15.19 m/s
Explanation:
The 1D kinematic equation for velocity is the v = v0 * at.
In this case, v is the final velocity (what we're after), v0 is the initial velocity, a is the acceleration, and t is the time elapsed.
v0 is 0 because at 0 seconds we are just releasing the ball.
a is the acceleration due to gravity as no other factors are specified.
t is the change in time.
v = 0 * -9.8 m/s^2 * 1.55 = -15.19 m/s.
