10 m dive. Time and horizontal displacement is known.

[andorini]

Homework Statement

A diver jumps from a 10 m platform.Time in air is 2.3 s. Horisontal displacement is 4 m.
What is the divers initial velocity and angle?

Homework Equations

No idea :'(

The Attempt at a Solution

No idea :'(

 

[imadrea]

suppossed initial velocity as Vo and angle is θ. horisontal displacement = Vo cosθ t. so that Vo cosθ = 40/23. vertical displacement = Vo sinθt - 1/2 g t². so that Vo sinθ = 329/46 (for g=10). by comparison with Vo sin θ and Vo cos θ obtained tan θ = 4,1. in such a way that θ = tan^-1 4,1. and Vo = 7,37.