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Catapult Challenge

Catapult Challenge. Mini-Catapults Projectile Motion Project. “Give me a place to stand and a lever long enough and I will move the world” – Archimedes . Levers. Levers are a simple machine consisting of a beam attached to a fulcrum.

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Catapult Challenge

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  1. Catapult Challenge Mini-Catapults Projectile Motion Project

  2. “Give me a place to stand and a lever long enough and I will move the world” – Archimedes

  3. Levers • Levers are a simple machine consisting of a beam attached to a fulcrum. • They are used to transmit and amplify force to do useful things. • •The three lever components are: • 1. Fulcrum. • 2. Input force, or effort. • 3. Output force, or load. • • Common levers: nail clippers, wrenches, crowbars, wheelbarrows, scissors, seesaws, and tweezers

  4. torque • Torque is the tendency of a force to rotate an object about an axis. • • To increase the magnitude torque, you can do three things: • 1. Increase the force applied. • 2. Increasing the length of the lever arm. • 3. Change the angle at which the force and lever arm cross each other (if they aren’t perpendicular)

  5. Guidelines for the Catapult Challenge: • You must work in groups of two. • You must build the teacher catapult on Friday and you CAN use it for the challenge, but you don’t have to. • If you want to build a different catapult, after you make the first one, it must meet these requirements: • It must be built by the students in class on Monday.  You CANNOT have any outside help.  You cannot build it over the weekend. • It must fit into an imaginary box that is 30 cm x 30 cm x 30 cm. • You cannot use any prefab pieces (like Legos, k’nex, kits, etc.) • You must bring all required materials.  None will be provided for you. • You must use the same catapult for all aspects of the challenge.

  6. Guidelines for the Catapult Challenge: • Launch day rules: • The teacher will place the target on the ground a distance of approximately 10 m from the catapult. • A rectangle will be drawn on the ground.  The rectangle will be 10 cm deep by 20 cm long.  All catapults must launch from within this box. • Each team will launch 3 mini marshmallows.  • The first time the marshmallow hits the ground (after leaving the catapult) counts as the landing.  If a marshmallow bounces, the first time it hits the ground counts. • The distance from the center of the target to the marshmallow landing is measured and recorded. • The distances are averaged.  The 3 teams with the smallest average distance move on to the next round.

  7. Guidelines for the Catapult Challenge: • Round one: There will be 3 class winners for each 8th grade science teacher and each period. • Class winners will go on to the finals.  • In the finals, the class champs from each teacher/period will go head to head and one winning team will win the “Golden Catapult Award.” • Decision of the judge is final.

  8. Mini Catapult Video Demo • https://vimeo.com/53871726

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