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The physics behind a catapult
Catapults physics
The physics behind a catapult
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Catapults were once used to launch furious bees and poisonous snakes onto their enemies. Catapults have influenced history and even the modern ideas of this world. Catapults were an extremely important advancement in technology, had many different purposes, and were very simple. Catapults were also very important in war. Catapults where a very important advancement in technology. One of the reasons that catapults were such a large jump in technology is because of the principle of stored energy. Stored energy is used in a catapult through a torsion cord. A torsion cord is a thick rope that is tightly twisted. The energy is released when the rope unwinds (Alchin, 2014). Catapults revolutionised the way war worked because they …show more content…
The bigger the catapult, the further it throws. So we can assume that it would be the best catapult. But that is incorrect. Larger catapults take a long time time to be adjusted to fire at the right distances, so smaller catapults, whose range is made for shorter distances, would be more adequate in that specific situation (Gurstelle, 2004). Catapults can break down or damage walls protecting cities or castles. They have even been used to hurl corpses or fire into the innermost part of the cities walls. Either way, it is an effective way to siege a castle (About.com, 2014). A ballista is a massive crossbow mounted on a wooden frame. They fired tremendous ironclad darts, or arrows (Alchin, 2014). Ballistea is the plural form of ballista. For power, they used a bow instead of a torsion cord or gravity as propulsion for their …show more content…
Torsion cords were large cords twisted as much as one could. They were placed at the bottom of the frame near the front. A wooden beam is then inserted into the middle of the cord. This beam is then is then adjusted to the correct angle it is fired at and cranked backwards. It is then secured, usually by a rope, until it is ready to fire. A wooden beam is also placed into the top of the frame where the arm will be stopped at. The arm is then loaded with some kind of ammunition and then released. As a consequence, the torsion cord unwinds at an exceedingly fast rate and swings the arm forward with it. When the arm hits the beam at the top, it jars to a stop, the force is then carried to the ammo and it sails forward. The arm is then winched back and the process is repeated (Gurstelle, 2004). Ballistea use a large bow to launch their darts or arrows at their enemies. Trebuchets, on the other hand, use gravity to pull massive counterweights down to swing the arm into a forward motion propelling the armament (O’Bryan, 2013). Catapults, though simple, had a devastating effect in a
World War Warfare was one of the greatest examples of technological advancement and strategic challenge, with the introduction of inventions such as the aircraft and the tank the battlefield transformed from attrition as scene in the early years of the war to decisive by the end of the war.
Question 5: “Texts construct characters who represent the best qualities in human nature, as well as those who represent the worst.” Discuss how at least ONE character is constructed in a text you have read or viewed. (Sem 2, 2016)
Earlier models just used a large weight on one end of a pivoting arm. The arm was pulled back the missile was placed and then let go.
First the energy of conservation. The setting of the trebuchet before firing is shown in Fig 1. A heavy counterweight of mass (M) (contained in a large bucket) on the end of the short arm of a sturdy beam was raised to some height while a smaller mass (m) (the projectile), was positioned on the end of the longer arm near or on the ground. In practice the projectile was usually placed in a leather sling attached to the end of the longer arm. However for simplicity, we shall ignore the sling and compensate for this omission by increasing the assumed length of the beam on the projectile’s side. The counterweight was then allowed to fall so that the longer arm swung upward, the sling following, and the projectile was ultimately thrown from its container at some point near the top of the arc. The far end of the sling was attached to the arm by a rope in such a way that the release occurred at a launching angle near the optimum value ( most likely by repeated trials) for the launch height. The launching position is shown in fig.2 where we have assumed that the projectile is released at the moment the entire beam is vertical. In the figures: (a)=height of the pivot, (b)= length of the short arm, (c)= length of the long arm, while (v) and (V) are the velocities of (m) and (M), respectively, at the moment of launching.
The gun was a hand-crank-operated weapon with six barrels revolving around a central shaft. Having a gun that revolves was very difficult because the barrels would not always line up correctly when being fired. The original gun was actually designed to fire the standard military issue paper cartridge of the day, .58 caliber. A .58 caliber bullet has a diameter of an inch and is capable of damaging anything it hits. The paper cartridge was placed inside a steel or brass chamber with a percussion nipple on the back end just like the muzzle loading rifles and pistols of there time.
Another type of catapult is the Onager. Onagers were used right up to the middle ages with the Trebuchet, when gunpowder and the Cannon were invented and eventually replaced the catapults.
According to Chevedden et al., (2002) the Latin word for trebuchet was “ingenium” and those who designed, made and used them were called inginators. These early engineers kept modifying the trebuchet to increase the range and impact force. One of the improvements engineers made was varying the length of the sling ropes so the shot left the machine at a ? angle of 45 degrees to the vertical (shown in the figure above), which produces the longest trajectory (Chevedden et al.,
Soldiers were ordered to load and they would take a cartridge and rip it open. Sometimes they would open them with their own teeth. After they opened it, they poured powder into the pan of the firing mechanism to fill it up. They would pour the main portion of the powder down into the barrel, and then they folded paper and put it into the barrel and dropped the ball at the top. They used the ramrod under the barrel of the musket to...
Many new and improved weapons and artillery were brought out during the war. One example of this introduction of new weapons was the long-range rocket. Also during this time, the atomic bomb proved to have a big impact on the war. Along with these new and improved weapons, falls the infamous tanks of World War II (Military History 1). Although some weapons proved to be more important than others, every weapon played an important role in fighting this war.
Crossbows can vary a lot in design and construction. They range from 50 to 400 lbs. in draw weight. They can be very small hand held pistols or rifles, which can fire rapidly and accurately with pinpoint accuracy up to 60 yards and kill ranges up to 100 yards. The larger bows with 400lb. draw weights could have ranges of over 400 yards they could fire large arrows, rocks and other types of projectiles accurately while staying well out of range of most enemy fire. These bows were built of large beams and sat on wheels so that 2 men could change the position of the bow easily. These bows were very powerful but were also very slow in loading and firing. They had mechanical winches, which were hand cranked to draw the bowstring back. It took two men to run these bows called siege machines.
...e went into motion. Possible projectiles of the trebuchet were living prisoners, jugs of Greek fire, rocks, and animals. Another large weapon of siege was used primarily in storms, the battering ram. In its early stages, the ram was no more than a hefty beam with a mass of metal attached to the end. Men would hoist the cumbersome boom onto their shoulders and run into a wall or door as many times as needed until the surface under attack gave way. In the Middle Ages, it was developed into more of a machine, for the ram hung from the center of a tent under which the men operating the ram could hide. The ram could be swung like a pendulum much more easily than having to constantly run back and forth. Also, castle guards often poured hot oil or other things onto the ram and its engineers. The tent, which was on wheels, protected the men and the battering ram as well.
The purpose of the projectile lab is to test the validity of the law of conservation of energy. The application of this law to our everyday lives is a surprisingly complicated process. Conservation of energy states that energy cannot be created or destroyed, but that it can be transferred from one form to another. Consider the projectile lab from document A that this essay is based upon. In an ideal experiment, the projectile is isolated from everything except the gravitational field. In this case, the only force acting on the particle is gravity and there are only two forms of energy that are of interest: the energy of the particle due to its motion (defined as kinetic
Also, more incent topic in history of the catapult was believed to have opened in 12th century France with the inventions of the trebuchet. This huge train of siege is stated to have hit good fear in the hearts of the opponents. The project and this pure power have hurled this example catapult history through the history.
These kinds of weapons were impractical for military use, but attracted many people to the arms race for weapons that could sweep the battlefield. “They had limitations in practice, among them slow re...
In this assessment of the projectile motion of an object, I found that it can be applied to many useful situations in our daily lives. There are many different equations and theorems to apply to an object in motion to either find the path of motion, the displacement, velocity, acceleration, and time of the object in the air.