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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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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-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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Renewable energy Renewable energy is any source of energy that doesn ’t consume the finite resources of the Earth and can be easily and quickly replenished. At present only a small proportion of the world ’s energy needs come from alternative and renewable energy sources. These exist in many forms including Solar Thermal‚ Photovoltaics‚ Wind‚ Hydro‚ Tidal/Wave and Bioenergy (including Biomass‚ Biogas and Biofuels). As with fossil fuels the sun ’s energy is the ultimate source of these energies.
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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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Ek=1/2 x 1735 x 422 Ek=876.5 x 422 =>876.5 x 1764 Ek=1‚546‚146 J 1‚546‚146/366536.5 = 4.22 As we can see through these equations‚ when we double the speed of an object‚ we quadruple the amount of energy involved in a car collision. This is why speed is such a crucial factor in the outcome of a car collision‚ as even increasing the speed a meagre 10kmph‚ can significantly impact the outcome of a car collision an end a life of a loved one. FEATURES
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Problems and Solutions in Elementary Physics by C. Bond The following sections include solutions to a number of my favorite problems in elementary physics. Some of the solutions bear aspects resembling that of a magician pulling a rabbit out of a hat. Others simply demonstrate the remarkable power of a few seminal concepts to reveal the inner workings of the real world. Most of the problems yield to solution strategies other than the ones shown‚ but these represent my own preference. At some point
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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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