There are three types of catapults:
1. trebuchet-a heavy beam that has a sling holding the projectile
-easiest to build out of the three
-has a pivoting beam that allows the beam to swing forward and shoot the projectile
-a counterweight is used to propel the beam forward
2. ballista-giant crossbow
-has more accuracy than catapult
-but has less range than catapult
-used Torsion spring (see picture below)
-had "fast snap" motion
rat traps use this same method
3. catapult-normal catapult that everyone thinks of when they hear catapult
-has winched-down (brought down using gears) bucket
-the gears create an enormous amount of potential energy
-when let go, all the energy is released at once------->projectile being shot farther
the winch is the little gear in the
middle of the catapult
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