Just tell me if this is even possible

[Mustapha13]

Homework Statement

Let's say that my friend throws a tennis ball down a building.

is it possible for me to find the time at which it hits the floor and at what speed it it is when it hits the floor. If he only tells me the initial speed and length of the building?



2. The attempt at a solution

(according to my thoughts, it seems impossible unless he tells me the time interval or the final speed, idk am i suppose to use the -9.8 acceleration for something?)

 

[PhanthomJay]

yes, it is possible. You need the kinematic motion equations for constant acceleration. In this problem, once the ball leaves the thrower's hand, at an initial speed, the ball is now subject only to the force of gravity, thus, it's acceleration must be ____?____.

 

[Mustapha13]

yes, it is possible. You need the kinematic motion equations for constant acceleration. In this problem, once the ball leaves the thrower's hand, at an initial speed, the ball is now subject only to the force of gravity, thus, it's acceleration must be ____?____.

9.8 m/s^2



Thanks a lot for the reply .