Week 4 trebuchet:
In week for we studied a trebuchet. A trebuchet is a kind of catapult that uses forces to launch a projectile such as tennis ball. We used weight to help the gravity pull down the sling. We noticed the more weights the further the ball went. The main parts of the trebuchet is the weight holder, the sling, the arm and the pivot. I think the Most important part is the pivot because the pivot turns to let the sling release the ball.