(adsbygoogle = window.adsbygoogle || []).push({}); 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!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Free fall tennis ball problem

**Physics Forums | Science Articles, Homework Help, Discussion**