Conservative force - Any force which conserves mechanical energy‚ as opposed to a nonconservative force. See statement of conservation of mechanical energy. Conservative System - A system in which energy is conserved. Energy - The ability to do work. Kinetic Energy - The energy of motion. Nonconservative Force - Any force which does not conserve mechanical energy‚ as opposed to a conservative force. Path independence - Property of conservative forces which states that the work done
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the momentum of an object if: (a) its mass is 4.0 kg and its velocity is 8.0 ms-1 (b) its mass is 500 kg and its velocity is 3.0 kms-1 (c) a force of 20 N is applied to it for 6.0 s and it moves from rest (d) its mass is 2.0 kg and it falls from rest for 10 s (assuming g = 10 ms-1 or 10 Nkg-1). 2. A car of 1200 kg is pushed along a level road by two men. If they use a force of 800 N and frictional forces acting against them are 560 N‚ calculate: (a) the work done by the men
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free market v. Command Economies Theoretical Economic Systems Basically‚ there are only three systems. At one extreme we have the free market economy where there is a very limited role for the government. At the other end we have the command economy‚ where the government takes virtually total control. As with market structures (with perfect competition and monopoly)‚ these two extremes are highly unrealistic. Just about every economy in the world is a mix of the two‚ and is‚ therefore‚ called
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Bailey Lovell Shakespeare Shaw 3 December 2010 The Fall of Othello It would seem to most that that the protagonist in William Shakespeare’s The Tragedy of Othello‚ the Moor of Venice should have everything going for him. A respected member of Venice’s elite and an integral part of the military‚ Othello appears to have it all together. However‚ a closer look reveals a few cracks in his otherwise firm foundation. Othello is a black man in a white world‚ and he is self-conscious about
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M07/4/PHYSI/SP3/ENG/TZ1/XX+ IB DIPLOMA PROGRAMME PROGRAMME DU DIPLÔME DU BI PROGRAMA DEL DIPLOMA DEL BI 22076512 physics sTANDARD level pApeR 3 Candidate session number Thursday 3 May 2007 (morning) 0 1 hour 0 INSTRUCTIONS TO CANDIDATES • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Answer all of the questions from two of the Options in the spaces provided. At the end of the examination
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A Good Fall The word Freedom has a different connotation in every part of the world‚ to have freedom means to have certain characteristics. These characteristics would be having the Third Eye‚ self-control‚ humility‚ and the ability to be able to overcome problems with a strategized plan. In the short story collection A Good Fall by Ha Jin‚ each story puts characters in dissimilar positions where they show whether or not they have the characteristics that define freedom. “A Composer and His Parakeet”
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A force can do one of four things to an object: 1. Make it speed up - accelerate. 2. Make it slow down - decelerate. 3. Change its direction. 4. Change its shape. If something is doing one of these four things there must be net force acting upon it. Newton’s First Law ’Every body continues in a state of rest or uniform motion unless acted upon by an external force.’ Something without net force acting on it will either stay still or move at a constant speed in a straight line until
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE Advanced Subsidiary Level and GCE Advanced Level MARK SCHEME for the May/June 2007 question paper 9702 PHYSICS 9702/02 Paper 2 (AS Structured Questions)‚ maximum raw mark 60 This mark scheme is published as an aid to teachers and candidates‚ to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an
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HSC Physics Space 1. The Earth has a gravitational field that exerts a force on objects both on it and around it Define weight as the force on an object due to a gravitational field Mass is a measure of the amount of matter in an object‚ it is measured in kilograms (kg). The weight of an object is a measure of the force with which it is attracted by a gravitational force‚ it is measured in Newtons (N). It is directly related to the strength of the gravitational field at a point where the object
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INTRODUCTION Falls continue to be one of the most devastating and life-altering occurrences facing older population. Falls are continuous threat to independent living and greatly impact the quality of life for patients and their families. The prevalence of falls is very high. The consequences of falls range from physical injury to psychological distress such as depression‚ anxiety‚ fear of falling‚ and decline in overall balance confidence. These consequences not only lead to activity restriction
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