mangonel‚ onager and ballista. There are many more types of catapults also. Catapults were an absolute revelation in weaponry. The mangonel was best suited for launching projectiles at lower angles to the horizontal‚ which was useful for destroying walls‚ as opposed to the trebuchet‚ which was well suited for launching projectiles over walls. However‚ the mangonel is not as energy efficient as the trebuchet for the main reason that the arm reaches a high speed during the launch. This means that a
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Trebuchet A Trebuchet is a siege engine that was employed in the middle ages. It is a modified version of the catapult that uses a counterweight to throw a large stone or blunt object. This means the only power it uses‚ is gravity. This invention brought about the end of knights‚ and castles. It’s usually made out of wood and some other materials‚ so it’s fairly simple to create; which means‚ most if not all societies in the middle ages had one. The trebuchet is often confused with the earlier
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however it is known that the continual catalyst for the development of firearms is and has always been military usage. The important needs‚ militarily speaking‚ for a firearm included the following: reliability of firing‚ accuracy of projectile‚ force of projectile‚ and speed of firing. (Klatt) The refinement of these various elements throughout time has proved to be very beneficial for forensic firearms examiners because of the increased degree of accuracy to which they can identify a firearm with
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1. List the components of the x-ray generating system and the primary functions of each. a. Line compensator- measures the voltage provided to the x-ray imaging system and adjust that voltage to precisely 220 V. input voltage can vary up to 5%. b. Autotransformer- is designed to supply precise voltage to the primary side of high voltage transformer and to the filament circuit. c. kVp controls- by selecting the major or minor kVp controls‚ a more precise kilovolt peak is provided. kVp
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How a Catapult Works: “Catapult physics is basically the use of stored energy to hurl a projectile the payload‚ without the use of an explosive.”1 The entire catapulting process depends on the storing of potential energy as tension of ropes or wooden arm or gravitational potential energy2 “Catapult" is the name given to a variety of related siege weapons used to hurl projectiles. Crucial during Medieval times and even earlier‚ these simple machines make use of stored energy. Th
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Comparison microscope Stereoscopic microscope Micrometer caliper chronograph A comparison microscope is a device used to analyze side-by-side specimens. It consists of two microscopes connected by an optical bridge‚ which results in a split view window enabling two separate objects to be viewed simultaneously. This avoids the observer having to rely on memory when comHistory In the 1920s forensic ballistics was waiting at its inception. In
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SOLUTIONS TO TUTORIAL 4 P.4.3.1 vx = v0 cos θ‚ vy = v0 sin θ − gt x = v0 t cos θ 1 y = v0 t sin θ − gt2 2 (a) The projectile moves up when vy is positive and down when vy is negative. vy = v0 sin θ − gt = 0 when t = The projectile is at ground level when 2v0 sin θ 1 y = 0 = t v0 sin θ − gt ⇒ t = 0 or t = 2 g Thus for t ∈ 0‚ v0 sin θ the projectile is moving up and for t ∈ g projectile is moving down. at t = t0 = 0‚ vy = v0 sin θ at t = 2v0 sin θ 2v0 sin θ ‚ vy = v0 sin θ − g g g = −v0 sin θ v0 sin
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Introduction Definitions of Linear Motion Distance Displacement Speed and Velocity Average Velocity Instantaneous Velocity Average Acceleration Instantaneous Acceleration Equations of Linear Motions Motion Graphs Free Falling Objects under gravity Projectile Motion Uniform Circular Motion ASD 2011/12 KINEMATICS 1/23 PPH0095 MECHANICS Mind Map ASD 2011/12 KINEMATICS 2/23 PPH0095 MECHANICS OBJECTIVES Upon completion of this chapter‚ you should be able to: 1) 2) 3)
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By: Hasan Abdullah (OSIS#200100360) Group: 1 Class: Introduction to Engineering (Mr.Cornish) Period: 9 Date: May 20‚ 2013 PROJECT OBJECTIVE The project objective was to learn about basic projectile motion theory‚ the mathematical models applicable to various projectile motion situations (e.g. catapult launch)‚ and construction techniques for specific raw building materials. In addition‚ a catapult was to be implemented and built based on an existing
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commence. Not only are tennis serves important‚ they also should be executed correctly to achieve the best possible outcome. I will evaluate my serve in regards to three major biomechanical principals‚ force & motion‚ momentum & inertia and projectile motion. (Hustler‚ 2012) Force is the change in the velocity of an object. Force changes when the objects motion changes usually by the pushing and pulling of the motion on that object. Force incorporates the law of acceleration ‘The acceleration
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