Trebuchet

last week I wasn't able to complete my big Trebuchet. My mum had a good idea to use our old swing set.

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The aim of a Trebuchet is like a catapult but instead of using something to drop on it to launch you use a counter weight instead for example in my one my counter weight was a 10kg plate. I would hold the piece of wood down and when I wanted to release it I would let go.

I got a big plank of wood as the arm and used the swing set as the pivot, we had a 10kg plate on the other end. And as you could see i would hold it down and then the tennis ball would realise. We found out that we needed a bit more length where the tennis ball is held, because the ball would release way too late which would make it go straight into the ground.