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W = Fd = m( V f 2 - V i 2 ) 2 W = Fd = 1 m D v 2 2

Energy – the ability to do work W = Fd = m a d V f 2 = V i 2 + 2a D x V f 2 - V i 2 = + 2a D x V f 2 - V i 2 = a D x 2. W = Fd = m( V f 2 - V i 2 ) 2 W = Fd = 1 m D v 2 2 Kinetic Energy – energy of motion

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W = Fd = m( V f 2 - V i 2 ) 2 W = Fd = 1 m D v 2 2

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  1. Energy – the ability to do work W = Fd = m a dVf 2 = Vi2 + 2aDx Vf 2 - Vi2 = + 2aDxVf 2 - Vi2 = aDx 2

  2. W = Fd = m(Vf 2 - Vi2) 2 W = Fd = 1 mDv2 2 Kinetic Energy – energy of motion KE = Ek = 1 mv2 2 units: kg (m/s) 2 = kg m 2 /s 2 = kg m/s 2 m = N m = Joule

  3. Work-Energy Theorem Wnet = DEk Fd = KEf – KEiFd = 1 mv2f - 1 mv2i 2 2

  4. Gravitational Potential Energy GPE = Ug = mgh units: kg m/s2 m = Joule

  5. Elastic Potential EnergyPEelastic = Us = ½ kx2k = spring constantunits: N m2 = N m mequilibrium

  6. Mechanical Energy – sum of all kinetic energy and all types of potential energyME = KE + SPELaw of conservation of Mechanical EnergyEnergy cannot be created nor destroyed, it can only changed from one form to anotherMEi = MEf

  7. Law of Conservation of EnergyPE + KE = PE + KE PE = KEUg = Ek mgh = 1 mv2 2

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