Why Boomerangs Come Back

Making a foam boffer sword for LARPing (Live Action Role Playing) is quite simple and affordable. Boffer swords are simply handmade weapons used on the battlefield during LARP events, which typically consist of either a small group of friends or a massive gathering of many people. They are quite sturdy and withstand a large amount of hits as long as they are made well. This depends largely on the amount of effort and time given to the project, as well as choices of materials used. Foam boffer swords allow the LARPer to express his or her creativity, while producing a weapon that will aid them on their adventures.

How is the boomerang able to fly back? (Because of their special curved shape, the two wings of the boomerang spin and create unbalanced aerodynamic forces. This disproportionate “lift” on the boomerang causes its flight path to form an egg shape, returning it to the thrower. Also, see the STEM extension to go deeper into this question.)

The first cannon was found in Sweden and was dated back to 1326. It was used at the battle of Crecy in 1346. Cannons changed the tide of the war. They could take down ships blow up groups of people and you could stuff screws and nails in the cannon and fire it called grape shot. The first step to load a cannon is you take the worm (sacrapos) and Coleman the barrel. The second step is to use the Ladle (Cuchara) and lightly dip it in the waste and stick it down the barrel, to make sure all the sparks are out. The third step is to put the cannon gal, i. With a bag of gunpowder and use the rammer (Atacador) to pack them in the cannon. The fourth step is to use the Vent Pick to break the bag of gunpowder. The fifth step is to step back and light the

The farthest back we have found of a recorded trebuchet was in ancient China approximately 300 BC. the trebuchets made by the chinese had not been counterpoise but traction trebuchets. These trebuchets are called traction trebuchets using ropes and pulleys to pull the arm down the energy being supplied via manpower these teams had about 40-50 men teams: 10 men for

Those who mounted the belly-bow would be launching a type of object with their belly on the launcher and that is where reference belly-bow came to be. The belly-bow consisted of a syrinx, a pipe and diostra, then lastly a slider. It was told that the gastraphetes could launch 40 pounds 200-300 feet in the air. With this new form of technology, Grecian engineers were able to evolve the gastraphetes into what we know as a catapult. The Grecians used a ballista creation of a catapult to launch objects into the desired target. To power the catapult, Grecians would use horse hair and an ox tendon. This helped create tension so that they were able to launch objects farther. In dire times of need, the women would cut their own hair to replace the horse hair. They also implemented wheels within their catapults to roll them to their desired spot. Often, the catapults weighed a few hundred pounds and would be nearly impossible for it to be carried multiple times a day. The wheels also made it easier during times of war. The farther the enemy was the closer the troops could have moved the catapult depending on their accuracy. The town of Syracuse was where most of the catapults that were

A second force that paper airplanes need to overcome is gravity and to do that you need keep your paper airplane's weight to a minimum to avoid gravity pulling your paper airplane down towards the ground. Thrust and lift are two other forces that help your paper airplane have longer flight. Thrust is the forward

Using this relationship assumes that the force constant is constant, or that moving the arms back 2 meters gives twice the force that moving them back 1 meter would do, which is most likely not correct, but close enough for a general assumption of the force to be made. When the force is applied, the projectile is accelerated to the end of the ballista, at which point it released with a velocity v and an angle q from the horizontal. The velocity can be found using the kinematic equation

After the war people came back with ideas and popular toys came out. Like the hula hoop, it was very popular. But most people don’t know the history of the hula hoop. First wham-o made the hula hoop in 1958. Also it dates back to the 1400’s (Hula Hooping). The history of the hula hoop is how it first was discovered, what it looks like and how it became so popular.

No one knows when or how kites were invented or their origin, but it is rumored that the kite first took flight in China, and was created when a Chinese farmer tied a string to his hat to keep it from flying in the wind, and

The catapult is an ancient artillery device that used the elastic power of twisted fibers to hurl projectiles. The invention of twisted fiber artillery and siege engines has been credited to the Greeks,from 300 BC. These catapults used a lot of human hair. tons of human hair is how much was needed for these machines.

Why does a basketball bounce higher than a bowling ball? Because it is made of different materials. A basketball is inflated with air and made with a rubber covering that has a high bounce factor. Bowling balls are made out of hard materials that don’t bounce. Why is bounce good for a basketball and not so good for a bowling ball? Using a baseball to play basketball or a bowling ball to play tennis doesn’t make sense. Different sports require the height from which the ball is dropped the ball’s level of ignition temperature the surface upon which the ball is bounced. The higher the ball is above the ground, the more its potential energy. As the ball is dropped and gravity forces it downward, the ball accelerates and gains speed. As the ball falls through the air, its potential or stored energy is converted into kinetic energy. The longer the fall, the more kinetic energy it gains and when it hits the ground, it bounces higher. As a ball bounces, it warms. An inated ball, like a basketball, bounces higher and faster when the temperature is warmer. This is because the distance between the air molecules in the ball increases, helping the ball maintain its round shape when it hits the ground. On cooler days, the distance between the air molecules gets smaller, causing the ball to be less inated. So, it attains more when it hits the ground. A lot of scientific research goes into developing the right bounce for the right ball. Several other factors affect the way a ball bounces.

Using a boom to capture plastic and keep it in areas where the boats can come and periodically pick it up

Kites have been around for a while. Although it is debated the first kite was created over 2000 years ago in china. From using kites as distance markers for war, to using them to avert evil sky spirits; kites gave been used for various purposes. In the 18th century the initial novelty of the kite wore off, and so the use of kites went into the field of science. In 1749 a meteorologist used a kite to measure the atmospheric temperature. Of course we can’t forget about the famous experiment conducted by Ben Franklin and his son to prove that lightning was in fact electricity. The kite was also key in the experiments and creation of the first airplane constructed by the Wright brothers. Kites have come a long way in history and have helped advance

Throughout the Australia's history, the boomerang is one of most distinctive and representative symbol which is strongly associated with Aboriginal culture.According to the research, Australia is not the birthplace of the boomerang. In fact, the boomerang has existed in other parts of the world for thousands of years. (Kevin, 2015) It is speculated that the initial aim of developing boomerang is used by hunting animals. Although the older boomerang as a hunting weapon has been used throughout Africa and Europe, Australian Aboriginal boomerangs already have ten thousands years of history. (Kevin, 2015) With the development of boomerangs,

The first construction cranes were invented by the Ancient Greeks and were powered by men or beasts of burden, such as