Catapult

Lately we have been building catapults in room 11 and it may sound dangerous but they are not 20 feet big catapults they are only 37 cm long and 15 cm wide and we used them to destroy hil.. I mean we used them to measure how far different objects would go. we used 2 beads and 2 items of our choice. we shot each object 4 times. the blue bar is the first time,the orange bar was the second time, the yellow bar was the third and the green bar was 4th. my smallest measurement was when the stick went 6cm