Answer:
8.6 m/s
Step-by-step explanation:
The components of the initial velocity of the ball can be found by using the equations:
![v_x = v cos \theta\\v_y = v sin \theta](https://img.qammunity.org/2020/formulas/physics/middle-school/m5rgmg9wr7kr7bix1ih0fqbqywu2khk80u.png)
where
is the horizontal component
is the vertical component
v is the magnitude of the velocity
is the angle above the horizontal
Substituting:
v = 15 m/s
![\theta=35^(\circ)](https://img.qammunity.org/2020/formulas/physics/high-school/orxxqy9rnqd49wkj8bqk2su2fsb4l73tts.png)
We find:
![v_x = (15)(cos 35^(\circ))=12.3 m/s\\v_y = (15)(sin 35^(\circ))=8.6 m/s](https://img.qammunity.org/2020/formulas/physics/high-school/1kugo4yuocka07khyahcrkr7c0zs5xxjd8.png)