Catapults have been used for a long time. They were used as a deadly war weapon. Catapults were first used by the Greeks‚ Romans‚ and the Chinese. They were one of the most effective weapons in war. The first attempts at catapults were to increase the range and power of the crossbow. A Greek historian named Diodorus Siculus was the first to document the use of a mechanical arrow firing catapult in 399 BC. It was also known as the Ballista. Catapults were introduced to Europe during the Middle Ages. Catapults
Premium
Senior High School of Jiangsu Province Abstract This paper introduces an experiment about launching a water rocket. The projectile motion of this water rocket will be examined.In this experiment‚the water rocket will be launched at 4 different angles 30°，45°60°and 90 °.We will measure the ranges‚maximum altitudes and air time in order to have a better understanding of the projectile motion.As the practical situation which includes the air resistance and different kinds of errors caused by students’
Premium Velocity Force Acceleration
Although some may believe that catapults were only utilized during the Medieval times‚ catapults have long been a part of history and have been diversely built by a number of civilizations. A catapult is a machine that fires projectiles by storing and quickly releasing energy. Catapults originated from the crossbow. As the crossbow increased in size‚ the weapon evolutionized into a machine‚ and the increase in size brought on changes in operation. The earliest known catapults were built and launched
Premium Catapult Ballista
used to throw a range of objects‚ from stones‚ poles‚ metal weapons and fireballs to
Premium Catapult Middle Ages Force
the union forces. Artillery was rapidly shifting its capabilities of being able to fire multiple projectiles. The civil war rooted over many problems with slavery as the main issue. The two largest artillery pieces used during the American Civil War were the Columbiads and Rodmans. They were strategically placed in forts
Premium American Civil War United States Confederate States of America
was also used by the Romans. Still another type of catapult‚ the Mangonel‚ was invented by the Romans in 400 BC. Catapults were extremely important to siege warfare. The French also used Catapults in the 800s. Catapults were meant to increase the range and power of a regular crossbow. War was widespread in Europe and castles and walls were used widely. Catapults were very useful in breaking down these walls. Catapults became ineffective
Premium World War II World War I United States
Q.1 A particle is moving in a straight line with initial velocity u and retardation αv‚ where v is the velocity at any time t [a] the particle will cover a total distance u/α [b] the particle will come to rest after 1/α [c] the particle will continue to move for a very long time [d] the velocity of the particle will become u/2 after time 1/α Q.2 A particle moves along the xaxis as x = u(t-1)2 + a(t-3)3 [a] initial velocity of the particle is u
Premium Velocity Acceleration Kinematics
keeping the parabola as horizontal as possible. For that reason‚ projectiles travel farther and the gradient of the trajectory remains small – not sleep. It is a very accurate missile weapon‚ but because of its fairly lightweight bolts‚ the ballista does‚ however‚ lack the high momentum of heavy rocks (80 – 140 kg) launched by trebuchets and mangonels. The operating crews were able to load spherical (stones) and shaft (bolts) projectiles according to the situation and the needs. The former were fired
Free Force Classical mechanics
Projectile motion is a form of motion where a particle (called a projectile) is thrown obliquely near the earth’s surface‚ & it moves along a curved path under the action of gravity. The path followed by a projectile motion is called its trajectory. Projectile motion only occurs when there is one force applied at the beginning of the trajectory after which there is no interference apart from gravity. The initial velocity If the projectile is launched with an initial velocity v0‚ then it can
Free Force Velocity Classical mechanics
The trebuchet is a type of siege engine originating in China sometime before the fourth century and used primarily during battle throughout the middle ages. This large artillery weapon worked by launching projectiles great distances to destroy walls to rubble or to throw diseased corpses over castle wall. One of the first documented use of a trebuchet was a traction trebuchet used at the Battle of Caishi in 1161‚ where trebuchets operated by the Song Dynasty fired bombs composed of lime and sulfur
Premium Force