Janay Wright-Parks Physics-Sports Paper Brad Ingram 29 March 2013 Physics of Gymnastics In the world of sports‚ physic concepts are being applied every day. Most people who play or watch a sport don’t think about the physics behind it all. When I watch a sport like gymnastics‚ I am always amazed at how a person’s body can bend and twist in the way that gymnasts bodies do. It is nothing but physics. Angular momentum is the main physics concept used in gymnastics‚ and this can be seen in events
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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
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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
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Conserving energy is very important because there is a limited amount of nonrenewable energy sources available on earth such as coal‚ oil‚ and gas. If people do not conserve the nonrenewable resources we have now‚ there might not be any left for future generations. In addition‚ energy conservation is important because when nonrenewable energy sources are consumed this impacts the environment. The combustion of oil‚ gas‚ and coal in power stations produces carbon dioxide and contributes to global
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SAMPLE PROBLEMS: 111-SET #9 ROTATIONAL MOTION PROBLEMS: 09-1 1) A grinding wheel starts from rest and has a constant angular acceleration of 5 rad/sec2. At t = 6 seconds find the centripetal and tangential accelerations of a point 75 mm from the axis. Determine the angular speed at 6 seconds‚ and the angle the wheel has turned through. |We have a problem of constant angular acceleration. The figure & coordinate system are |[pic]
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-1.80 m/s 2.40 kg 4.80 kg +1.30 m/s 0.0 m/s -.433 m/s 2.50 kg 3.90 kg .850 m/s 11.5 kgm/s 2.68 m/s 5.10 kg 1.00 kg 0.900 m/s -4.60 m/s 4.60 m/s KE stands for Kinetic Energy and is measured in joules. Note that kinetic energy is not a vector quantity. Describe the effect of an elastic collision on the total kinetic energy of the two-object system.
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3 Work‚ Power and Energy At the end of this section you should be able to: a. b. c. d. e. f. describe potential energy as energy due to position and derive potential energy as mgh describe kinetic energy as energy due to motion and derive kinetic energy as mv2/2 state conservation of energy laws and solve problems where energy is conserved define power as rate of energy transfer define couple‚ torque and calculate work done by variable force or torque solve problems where energy is lost due to friction
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release of nuclear energy occurs when the nuclei of atoms are changed. Hydrogen and uranium are two kinds of matter used to produce nuclear energy. In a nuclear reaction‚ the tremendous binding energy inside a hydrogen or uranium nucleus is released. Nuclear energy is released during atomic fission‚ when uranium nuclei are split. It is also released during fusion‚ when hydrogen nuclei combine to form a helium nucleus. In fission and fusion‚ nuclear energy produces thermal energy‚ which is given
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more than enough energy to satisfy global energy needs for an entire year. Solar energy is the technology used to harness the sun’s energy and make it useable. Solar Energy is the energy from the Sun. The Sun is a big ball of heat and light resulting from nuclear fusion at its core. The nuclear reaction releases energy that travels outward to the surface of the Sun. Along the way to the surface the energy transforms so that by the time it is released it is primarily light energy. The two major
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velocity and acceleration of a particle or rigid body in motion. 2.- Use the second law of motion to calculate acceleration and obtain information about the forces acting on the object. 3.- Use energy methods such as concepts of work‚ kinetic and potential energy in solving problems involving forces depending on the object’s position. 4.- Use momentum methods to determine the change in object’s velocity. Analyze impacts and forces exerted by continuous flow
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