List of directions

1.take the catapult outside

2.put rubber bands on the catapult

3.pull the arm back to -30 degrees

4.let the arm go

5.as you let the arm go, start the timer

6.as the ball hits the ground, stop the timer

7.measure the distance from the catapult to the ball

8.repeat steps 3-7 at -40 degrees, then -50 degrees

9. then divide the distance by the time to get the speed