Most curricular materials in TeachEngineering are hierarchically organized; i. Some activities or lessons, however, were developed to stand alone, and hence, they might not conform to this strict hierarchy. Related Curriculum shows how the document you are currently viewing fits into this hierarchy of curricular materials. From medieval times to the present day, engineers have designed catapults to launch into the air projectiles as varied as stones and airplanes.

Evans, U. Engineers must master the science and math concepts behind a given technology before they can successfully design and build products that meet their clients' needs. Each TeachEngineering lesson or activity is correlated to one or more K science, technology, engineering or math STEM educational standards.

In the ASN, standards are hierarchically structured: first by source; e. Support an argument that the gravitational force exerted by Earth on objects is directed down.

Grade 5. Do you agree with this alignment? Thanks for your feedback! Alignment agreement: Thanks for your feedback! View aligned curriculum. Students are introduced to the physics concepts of air resistance and launch angle as they apply to catapults. This includes the basic concepts of position, velocity and acceleration and their relationships to one another.

Students experience the engineering design process as they design and build accurate and precise catapults using common materials.

They use their catapults to participate in a game in which they launch Ping-Pong balls to attempt to hit various targets. Today we are going to learn all about catapults and the important math and science concepts behind them. We are preparing for an activity we will get to do very soon, during which we will design and build our own catapults. Like engineers following the engineering design process, before we begin designing or building, we must research catapults and learn as much as we can about them.

Who has heard of catapults? What do they consist of?Time Required: 10 hours ten minute class periods. Full Design Process These resources provide students with the opportunity to complete the full engineering design process to solve either a provided or student-generated design challenge. Although no charge or fee is required for using TeachEngineering curricular materials in your classroom, the lessons and activities often require material supplies.

The expendable cost is the estimated cost of supplies needed for each group of students involved in the activity. The trebuchet is a classic example of ancient engineering design. Not only is it a compound machine a device that uses a number of simple machinesit relies on one primary simple machine, the lever, to launch a projectile.

Trebuchets were engineered due to an enhanced understanding of gravity, potential energy, and acceleration—each of which is a key concept in engineering today. This design project allows students to use the engineering design process to research, design, and build a trebuchet.

They also rely on their knowledge of algebra and physics to explain their results. The steps of the engineering design process.

Each TeachEngineering lesson or activity is correlated to one or more K science, technology, engineering or math STEM educational standards. In the ASN, standards are hierarchically structured: first by source; e. Define the criteria and constraints of a design problem with sufficient precision to ensure a successful solution, taking into account relevant scientific principles and potential impacts on people and the natural environment that may limit possible solutions.

Grades 6 - 8. Do you agree with this alignment? Thanks for your feedback! Alignment agreement: Thanks for your feedback! Develop a model to generate data for iterative testing and modification of a proposed object, tool, or process such that an optimal design can be achieved. Evaluate competing design solutions using a systematic process to determine how well they meet the criteria and constraints of the problem. Design a solution to a complex real-world problem by breaking it down into smaller, more manageable problems that can be solved through engineering.

Grades 9 - View aligned curriculum. Students are introduced to three of the six simple machines used by many engineers: lever, pulley, and wheel-and-axle.Aidan and I have been on a quest the past couple of years to design a catapult that will launch water balloons. We were hoping that this one would do the trick, but alas, water balloons are really hard to launch because of their weight and wiggly shape.

However, this catapult shoots ping pong balls and water bombs really well, and building it does not require special tools or a trip to the hardware store! The design of our catapult was inspired by this post that I found on Pinterest. I figured that dowel rods might make a bigger and stronger catapult, so we decided to do that instead of pencils. Then add three more rods to make the square base of the catapult, like this. Add a horizontal rod at the top on the side where the shooting arm is.

Put this horizontal rod a couple of inches down from the top. Then, connect all of the vertical rods at the top, so that your catapult looks like this. However, I figured it was easier and cheaper to buy the pre-cut ones.

homework science catapult

My husband and my almost 10 year old assembled the catapult together. Aidan could probably assemble it himself now that he knows how to do it.

How does a catapult work?

Aidan enjoyed tinkering with the catapult to get it to shoot as far as possible. He really enjoys engineering type activities like that. Extend the catapult fun with some variables to test! Wow, that looks like a boy's dream! I am not quite ready for my 4 year old to try this, but wow would he love it!! I just made this with my 3 years old son. He helped me just by choosing the rubber bands, and enjoyed looking me making a new toy.

He's playing with it for 1 hour and is anxious to show it to his friends! Thank you for the idea and explanations! Very fun activity! Thanks for sharing. My daughter loved making hers and playing with it!

How to Build a Catapult out of Dowel Rods and Rubber Bands

Made for a fabulous July 4th family activity! This looks awesome! I'm going to make this with my boys I had an idea though Thanks so much, easy to follow! Plus me and my partner already had all the supplies needed so yay! We also hot glued the joints after using elastics to make them stronger.

I will make some for on my sons eagle scout party they made one In scouts and had a blast with it thought it would be cool as a table dec. The rubber bands are good to build with but no stability. I recommend zip ties to secure the structure. A base is my next move. Thank you so much for this idea! I'm currently working on a catapult project in my physics class so I'll be definitely using this idea!

Great catapult! I thought it would take me hours but took less than 25 min.Though the definitions for types of catapults vary, each shares this goal: to hurl an object through the air. There are are three primary technologies that fall into the "catapult" category.

homework science catapult

The catapult : the winched-down bucket that people normally think about when they hear the word "catapult" see this page for a picture. The ballista is a very large crossbow see this page for a picture.

A trebuchet is a weighted beam that swings a sling carrying the projectile see this page for pictures. A trebuchet tends to be easier to build because it consists simply of a pivoting beam and a counterweight that rotates the beam through an arc. Catapults can launch things a fair distance -- to 1, feet to meters is common. It is surprising how much energy they can store. The gears are important, because they create a winch. The winch allows a person to put a great deal of energy into the catapult over a period of time.

Then all of the energy releases at once, throwing the projectile. Lots More Information. Related Content " ". Should black box data be stored in the cloud? How Trains Work.Teachers Pay Teachers is an online marketplace where teachers buy and sell original educational materials. Are you getting the free resources, updates, and special offers we send out every week in our teacher newsletter? Grade Level. Resource Type. Log In Join Us. View Wish List View Cart. Sort by: Relevance.

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Sort by Relevance. Price Ascending. Most Recent. Digital All Digital Resources. TpT Digital Activities. Made for Google Apps. Other Digital Resources. Grades PreK. Other Not Grade Specific. Higher Education. Adult Education. Art History.A catapult is a simple mechanism used to forcefully propel stones, spears, or other projectiles. It has been in use mainly as a military weapon since ancient times.

Soldiers would use the catapults in both siege and defense maneuvers to capture or protect cities or castles. In modern times, catapults using hydraulic pressure, tension, or other force are used to launch gliders, aircraft, or missiles.

A catapult is generally considered to be a large engine that is used to hurl stones from a single long arm that swings forward. Nearly all catapults employed in ancient and medieval artillery operated on the same principle. A winch is attached to a long wooden arm with a cup or sling on the end. A rope is attached to the arm and the winch. By turning the winch one way, the rope tightens. An object gets put in the cup or sling, and, when the rope is released, the cords around the base untwist.

This action allows the arm to swing forward, flinging the object. Several varieties of catapults were used. The ancient Greeks and Romans used a heavy crossbowlike weapon known as a ballista to shoot arrows and darts as well as stones at enemy soldiers.

They were also the ones to introduce catapults on wheels. The medieval trebuchet was powered by gravity. In this weapon, the long end of an arm on a pivot was hauled or winched down and then released. A heavy counterweight at the short opposite end of the arm dropped and swung the long end upward. Take a minute to check out all the enhancements! Choose a language from the menu above to view a computer-translated version of this page.

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homework science catapult

Subscriber features. Print Subscriber Feature. Email Subscriber Feature. Cite Subscriber Feature. Translate Subscriber Feature.Level : Grades Group size: students. Time Required: Two or three minute class periods. Lesson PDF. In this lesson, students in grades learn about the history of catapults and how they work.

They assemble their own catapult model, making adjustments to improve its performance. Students gain engineering experience while learning principles of physics and working with the scientific processes of experimentation and trial and error. Students will gain an experience in engineering while learning principles of physics and working with the scientific processes of experimentation and trial and error.

Standard 4. Trajectory — The path or curve described by a body as a planet or projectile under the action of given forces.

homework science catapult

Potential Energy — The kind of energy that a body has by virtue of its position. When a body is raised to a higher level, it is able to do a certain amount of work in falling back again, and hence it was given a certain amount of potential energy in raising it. Kinetic Energy — The energy that a body has by virtue of its motion. Once the spring is released, it will return to its original configuration usually expending the stored energy as rapidly as possible. The same goes for stretching a spring; when released, it will collapse back to its original configuration.

Trigger — The device used to release the catapult once it has been loaded and charged to fire the projectile. Range — Distance for which a projectile can be thrown. Activity sheets. To borrow a kit, please apply online.

Please note that there is limited availability of kits, which must be requested 2 weeks prior to shipment date. For more information, please contact the lending librarian, Kevin Dilley at Over years ago, the Greeks and Romans did not know about gunpowder, yet were able to hurl projectiles over a large distance using kinetic energy storage devices. Through the years, some modifications were made to increase the accuracy and throwing distance of these machines.

The first two types of throwing machines were the catapult and the ballista. The catapult started out as a large cross bow to shoot oversized arrows at an enemy. The ballista was about 10 times larger than a catapult and threw large stones.

The free ends of the wooden pieces are connected together with a rope. The projectile to be thrown is held by the connecting rope used as a sling. When most people think of the catapult, they are actually thinking about an onager. The strange name is derived from a wild donkey kicking with its hind legs. The onager or gone, mangonel, or nag was typically a single spar held in a more or less vertical position by a torsion device rotating around a horizontal axis.

The projectile was located in either a pocket at the top end of the spar or in an attached sling. The choice of the Middle Ages was a trebuchet. This device used gravity instead of torsion springs to provide propulsion energy. The theory is simple: put a large weight at the short end of a lever arm and put the projectile in some kind of basket at the other end of the lever.

The velocity of the projectile can become quite large when the ratio of the lengths of the lever arms is great. Incidentally, the trebuchet was also used as a punishment device called the ducking stool.