Work and Energy Worksheet Section 1 Work: 1. A person pulls a toboggan for a distance of 35.0m along the snow. The force in the rope (tension) is 94.0N. How much work is done on the sled? Solution: W= Fd W= 94.0N x 35.0m W= 3290 Nm or J 2. The cable of a large crane applies a force of 2.2x10^4N to a demolition ball as it lifts it vertically a distance of 7.6m. a) How much work is done on the ball? b) Is the work positive or negative? Why? Solution:
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particles do not change. The moment of inertia of a single particle I can be expressed as [pic] where m = the mass of the particle‚ and r = the shortest distance from the axis of rotation to the particle. [pic] KINETIC ENERGY OF ROTATION AND MOMENT OF INERTIA: The kinetic energy of system of particles of masses m1‚ m2…….mn is defined as K.E = [pic] = [pic] Substituting v = (r [where ( is the angular speed of the rotating body]‚ we have K.E = [pic] in which ( is the same for
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Abstract :The purpose of the experiment is to explore elastic and inelastic collisions in order to study the conservation of momentum and energy. The guided track‚ carts‚ photogates ‚ 250 g weight and picket fences were the primary components used in the procedural part of the experiment. Each experiment involved the use of the photogates and picket fences to measure the initial and final velocities of both carts when they collide. The data was collected and translated to a graphical model for further
Free Kinetic energy Classical mechanics Introductory physics
What is momentum? Momentum of a body is defined as the mass multiplied by the velocity of this object. Momentum= m x v Momentum and Newton’s second law of motion: The resultant force is proportional to the change in momentum per a second. We know that force = mass x acceleration. So F (mv-mu)/t F m (v-u)/t = ma so F=kma Momentum is a vector quantity: Momentum has a direction as well as a magnitude Momentum and Newton’s first law of motion: An object remains at
Free Kinetic energy Classical mechanics Force
FORM 7 NOTES ‚ EXAMPLES ‚ PROBLEMS & SOLUTIONS Table of Content Chapter Topic Page 1. Mechanics …………………. 2 2. Gravitation …………………. 61 3. Direct Current ………………….. 71 4. Electrostatics …………………. 90 5. Simple Harmonic Motion ……. 116 6. Waves ………………………… 128 7. Magnetism …………………. 156 8. Electromagnetic Induction …… 162 9. Atomic Physics …………. 184 10. Answers …………. 194
Free Force Classical mechanics Kinetic energy
POTENTIAL ENERGY DIAGRAM In physics the terms of mechanical energy usually refers to Potential energy (U) and Kinetic Energy (K). In the absence of non-conservative‚ or dissipative forces‚ these energies obey the law of conservation of energy‚ or ΔU + ΔK = 0. That is‚ when a system is only acting under the influence of conservative forces its total energy content never changes‚ the energy just converts between forms. At any point in the cycle‚ the total energy is constant‚ U + K = Umax = Kmax
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Practice Exam for APEs Chapters 1‚2‚3‚4‚5‚6‚8 &28 Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. A person who is primarily interested in the establishment of new wilderness areas would be considered a(n) a. ecologist. b. preservationist. c. restorationist. d. conservationist. ____ 2. Natural capital includes all of the following except a. sunlight. b. air. c. water. d. soil. ____ 3. All of the following illustrate
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Physics Energy Exploration Project Energy can be stored in many forms as potential energy. It can be extracted through chemical and mechanical processes to get usable energy. We use that kinetic energy and electricity every day to power our lights‚ run our cars and do most of our tasks. Fossil Fuel is a non-renewable energy source. It results from the decomposition of dead and buried organisms. They are millions of years old and are fossilized under rock and sand. They are efficient energy producers
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11 Using Energy © 2010 Pearson Education‚ Inc. Slide 1 © 2010 Pearson Education‚ Inc. Slide 2 © 2010 Pearson Education‚ Inc. Slide 3 © 2010 Pearson Education‚ Inc. Slide 4 Reading Quiz 1. A machine uses 1000 J of electric energy to raise a heavy mass‚ increasing its potential energy by 300 J. What is the efficiency of this process? A. B. C. D. E. 100% 85% 70% 35% 30% © 2010 Pearson Education‚ Inc. Slide 5 Reading Quiz 2. When the temperature of an ideal
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Forms of Energy Energy Is the capacity to cause change Exists in various forms‚ of which some can perform work Kinetic energy Is the energy associated with motion Potential energy Is stored in the location of matter Includes chemical energy stored in molecular structure AP Biology 1 Division Ave. High School Ms. Foglia AP Biology Energy can be converted From one form to another On the platform‚ a diver has more potential energy. Climbing
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