Question

A baseball is hit from home plate and it winds up in the stands as a homerun. From the point it was hit, it lands a horizontal displacement of 121.9 meters and a vertical displacement of 21.2 meters (in +y direction). If it took 5 seconds to travel from home plate to the stands, what would the range of the baseball been if the stands were not there, in meters. In other words, if the stands weren't there what is the range for the vertical displacement to be zero meters?

Answer 1

well, the x speed (v cosθ) is clearly 121.9/5 m/s

Now you can get the y-speed and θ, and work out the range.