experiment analyzes the relationship between the kinetic energy of a wooden block and the distance a mass falls. Based on the results‚ the block’s kinetic energy and velocity increase with the falling distance‚ as predicted. But little changes in velocity near the end of the motion show that friction and other factors might be important. The block’s maximum velocity ranged from 0.869 to 1.193 m/s at different falling distances‚ and its resulting kinetic energy ranged from 0.074 to 0.134 J. Introduction
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Introductory Physics I Elementary Mechanics by Robert G. Brown Duke University Physics Department Durham‚ NC 27708-0305 rgb@phy.duke.edu Copyright Notice Copyright Robert G. Brown 1993‚ 2007‚ 2013 Notice This physics textbook is designed to support my personal teaching activities at Duke University‚ in particular teaching its Physics 141/142‚ 151/152‚ or 161/162 series (Introductory Physics for life science majors‚ engineers‚ or potential physics majors‚ respectively). It is freely
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we test factors which affect friction. We pulled a wood block across a surface to determine whetherthe surface area ofthe block orthe type ofsurface affectsfriction. We found that the surface area of the block did not change the coefficient of kinetic friction‚ while the types of materialsin contact were directly related to the coefficient of kinetic friction. INTRODUCTION Friction is a part of our everyday life. Nearly every movement we make involves friction‚ and we have instinctively learned
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Chapter 1: Technical Measurement and Vector 5. Newton’s law of universal gravitation is represented by [pic] where F is the gravitational force‚ M and m are masses‚ and r is a length. Force has the SI units kg ∙ m/s2. What are the SI units of the proportionality constant G? 8. The speed of light is now defined to be 2.99 7924 58 × 108 m/s. Express the speed of light to (a) three significant figures‚ (b) five significant figures‚ and (c) seven significant figures. 15. A rectangular
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CONTENT IN BRIEF PART I Mechanics of Rigid Bodies 1. Resultant of concurrent and non-concurrent coplanar forces. 2. Equilibrium of concurrent and non-concurrent coplanar forces. 3. Centroid of plane areas 4. Moment of Inertia of plane areas 5. Kinetics: Newton’s second law‚ D’Alembert’s principle‚ Work- Energy‚ and Impulse- Momentum principle. Mechanics of Deformable bodies PART II 6. Simple stresses and strains 7. Statically indeterminate problems and thermal stresses 8. Stresses on inclined
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Topic 1 Units‚ Conversions‚ and Estimation 1.1 Conceptual Questions 1) The current definition of the standard meter of length is based on A) the distance between the earthʹs equator and north pole. B) the distance between the earth and the sun. C) the distance traveled by light in a vacuum. D) the length of a particular object kept in France. Answer: C Var: 1 2) The current definition of the standard second of time is based on A) the frequency of radiation emitted by cesium atoms. B)
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rightful inventor of this object‚ most sources claim that Newton’s Cradle was invented by Marius Morin and was later coined “Newton’s Cradle” by English actor in 1967. This popular executive toy exhibits various concepts related to physics including friction‚ collisions‚ conservation of energy‚ and conservation of momentum. Momentum is force of moving objects. It can be measured by multiplying an object’s mass and velocity. Basically‚ the concept of conservation of momentum is that the total momentum
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Theorem Practice Problems 1. A 0.600-kg particle has a speed of 2.00 m/s at point A and kinetic energy of 7.50 J at point B. What is its speed at B? the total work done on the particle as it moves from A to B? kinetic energy at A? its WWW.MIAMI-BEST-MATH-TUTOR.COM PHYSICS.I.MORE.ON.WORK.ENERGY.7.2.PRACTICE.PROBLEMS PAGE 1 OF 8 2. A 0.300-kg ball has a speed of 15.0 m/s. its kinetic energy? What is its kinetic enery? If it speed were doubled‚ what would be WWW.MIAMI-BEST-MATH-TUTOR.COM
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were: (1) the light and thin CD’s that I used as wheels minimized the friction between the car and the ground‚ causing the car to go a greater distance as opposed to the distance thick‚ heavy wheels would go. (2) The balloons that were wrapped around the wheels created traction and prevented the the wheels from slipping on the
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up potential energy it quickly creates a large amount of kinetic energy. The most popular systems are either a Linear Induction Motor which use electromagnets or the Rotating Wheels method which use thousands of spinning wheels to propel the cart. Last are the brakes; a series of clamps are positioned on the track at the end of the ride‚ these clamps close in on metal fins under the ride that gradually use friction to slow the ride
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