Calculating the Distance of a Ball Kicked Off a Cliff

[RiversAlone]

Homework Statement

A ball weighing 5kg is kicked off a cliff with the height of 20 meters.
What is the distance the ball travels?

Known:

g (gravity) =9.80
I (impulse) = 50kg m/s
m (mass) =5kg
h (height) =20m

Unknown:

d=?

Homework Equations

?

The Attempt at a Solution

Found the v(f) which is 10 m/s.
Found the v(i) which is 0 m/s.

 

[RiversAlone]

t = square root of 2*20/9.81

t= 2.019 seconds

 

[Redbelly98]

Homework Statement

A ball weighing 5kg is kicked off a cliff with the height of 20 meters.
What is the distance the ball travels?

Known:

g (gravity) =9.80
I (impulse) = 50kg m/s
m (mass) =5kg
h (height) =20m

How do you know the impulse is 50 kg m/s? The problem statement did not say anything about impulse.

Unknown:

d=?

Homework Equations

?

The Attempt at a Solution

Found the v(f) which is 10 m/s.
Found the v(i) which is 0 m/s.

How did you get these?