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STEM Challenge (Designs (Second design (Steps (place 4 thin popsicle…
STEM Challenge
Designs
First one: 
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Was pretty good at getting things far though, sadly not far enough
Second design
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Steps
- place 4 thin popsicle sticks together at a 90-degree angle
- glue together using a glue gun
- add 2 more thin popsicle sticks to both sides to create 60-degree angles (horizontal)
- glue together using a glue gun
- add 2 more popsicle sticks to both sides to create 60-degree angles (vertical)
- glue together using a glue gun
- add the 2 thick popsicle sticks to the horizontal triangles
- glue together using a glue gun
- add a cross beam using a thin popsicle stick at the top of the vertical triangles
- glue together using a glue gun
- add a thin popsicle stick to 45-degrees using a protractor to get exact measurements
- glue together using a glue gun
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- glue together using a glue gun
- add the elastic band and loop it around the cross beam and underneath the spoon
Research
Types of catapults
The Trebuchet was designed for max power and distance. The Trebuchet has a long arm that is balanced on a fulcrum and a short arm attached to a counterbalance. A sling was attached to the end of the long arm and then a rope was attached to the long arm and pulled down until the counterbalance is high in the air. The rope is then released and the counterbalance plummets down. The energy provided by the long arm brings to swing the short arm and when the long arm comes to a stop the projectile continues with the velocity.
The Mangonel is the most iconic type of catapult and is what most people think of when they thick of a catapult. The Mangonel consists of a long wooden arm with a bucket, that holds the object that is being projected, with a rope or string attached to the end. The arm is pulled back and energy is stored in the rope and in the arm. When the arm is released, it would return to its upright position and come in contact with a block that would stop the arm but the object would continue to be projected towards the enemy. (very bad accuracy)
The Ballista is a missile weapon that launches a large projectile at a distant target. The Ballista is very similar to a crossbow in the sense that they function very similarly. Two wood arms are attached to a piece of rope and the rope is attached to a winch that is pulled back, bending the arms of the weapon. When releasing the Ballista, the built up tension in the rope would send a large arrow towards the enemy with extreme accuracy. (it is not able to go long distances)
Trajectories
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