Hello, i have to work out the velocity of a catapult which i had to do for my AS Quality of measurement coursework where I'm trying to find the optimum angle of launch. 1. The problem statement, all variables and given/known data A ball is fired from a catapult 0.5m above the ground, the ball hits the ground 1.45m away, the angle of launch is 45°. Calculate the velocity of the ball. 2. Relevant equations v^2= u^2 + 2as 3. The attempt at a solution Attempted it by plugging numbers into that equation but comes up with 37.6 m/s, whilst watching the catapult fire it took a few seconds to land so it couldn't be that fast, although after using Time = Distance/Speed it appears to be 3.9s which could be right but I'm not sure. Am I using the wrong equation i need to compare this to other angles but not sure what equation to use with angles.