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Watch the video at the beginning of the article for step by step instructions or continue reading… INSTRUCTIONS FOR MAKING POPSICLE CATAPULT: Unlike the trebuchet which was well suited for launching projectiles over walls, this type of the catapult was best suited for destroying walls since it launched projectiles at lower angles. When crossbar is reached, the arm stops and projectile continues moving due to the force. The launch velocity of the projectile is equal to the velocity of the arm at the bucket end and the angle is controlled by stopping the arm with a crossbar. Upon release, the arm rotates at a high speed and hurls the projectile. Trebuchet – the biggest and the most powerful version of the catapult, it could hurl 50-100kg stones over the distance of 300mĬatapults are using the laws of physics, primarily tension and gravity to store and then release energy which hurls a projectile without the use of explosives.Ĭlassical catapult consists of an arm with a bowl-shaped bucket attached to the end in which we put projectile.Ballista – giant immobile crossbows whose projectiles were large arrows or darts made from wood with an iron tip.The trebuchet was invented to answer that need.īesides classical catapult (also known as mangonel ), two most popular designs were: But the golden period of the siege weaponry began in middle ages when the stone walls and improved defenses called for more force, precision and range. They even used catapults to hurl carcasses so they spread disease and demoralize their opponents. They started to use catapults as a sling to throw rocks on their enemies. Romans adopted the technology and improved its design. Catapults in this form were first used in ancient Greece and India around min 5th century BC. The first designs were inspired by crossbows and the need to fire larger projectiles. And it is important it’s doing that without the use of explosives. When we hear the word catapult, we probably imagine sieges on medieval castles, but catapults were actually used much before that and their design varied a lot.īut what is a catapult ? In a most general sense, a catapult is a machine which purpose is to hurl objects through the air with the intent of hitting some target.
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Not that we count! 🙂 But there are many great ways to use those sticks and today we will show you how to use them to make AN awesome catapult Step Five – Prepare for accuracy and distance competition.Mhmm, ice cream… Who doesn’t like it? If you are a fan of an ice cream on a stick or a popsicle you probably threw away many sticks. Step Four – Retest and re-evaluate device. Figure out a way to strengthen these areas, making a better device Step Two – Decide on a design and build it. As you sketch, new ideas will come to you…add them on! Consider a method of cushioning the devise (bring it to a stop) so it does not self destruct. Learn from your first design and then re-engineer it for improved performance. Remember to allow for easy rubber band attachment. Requirements: Marshmallow must go at least 5 feet, and be as accurate as possible (close to the target). In this activity, you will build a lever that will move the load, which is the marshmallow. The distance from the load to the fulcrum is called the effort arm.
The object that one is trying to move is called the load. The object that does not move is called the fulcrum.
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A lever consists of a plank that is free at both ends, and a steady object on which the plank can rest. The lever is one of these simple machines. There are six simple machines for performing work. People exert this force to move objects from one place to another. When you push or pull on an object, you are exerting a force. Purpose/Problem: You are to design and create a catapult-like device that will launch a marshmallow at least 5 feet forward with accuracy.Ĭatapult – An ancient weapon for throwing large stones, burning debris, etc. Ready, Aim, Fire!!! Popsicle Stick Catapult
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It comes with a full outline and rubric and it’s Free.
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If you would like something for older students, please click here to download my Physics Popsicle Stick Catapult Lab Activity. Shown below is a great activity for younger grades. The Catapult is great for all ages.Ī colleague who has used this activity sent me her lab, if you’re interested, please have a look at the activity as it would really help to get your kids engaged and using their hands! Please check her out on Pinterest for more great ideas – How great would this be as an inquiry project, something to introduce projectile motion, or just as a really cool activity in the classroom.
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