1. The problem statement, all variables and given/known data A tennis ball is hit down at an angle of 30° below the horizontal from a height of 2 m. It is initially travelling at 5.0 m s−1. What is the velocity of the ball when it hits the ground if we can neglect air resistance? 2. Relevant equations 3. The attempt at a solution ok so I actually attempted it and want to know if my answer is correct as the actual answer is 8.0 i got 8.3, is this just due to rounding errors or is my working wrong; So I got the final horizontal and vertical components and sumed them to get the resultant/final speed of the ball. so for the horizontal speed = cos 30deg x 5 = 4.33 for the initial vertical speed = sin 30deg x 5 = 2.5 final vertical speed = 7.5 then sqtr of 4.33^2 + 7.5^2 to give me 8.3 is this correct? thanks to anyone that checks much appriciated!