VIEWS: 3 PAGES: 11 POSTED ON: 1/17/2012
POTENTIAL ENERGY & KINETIC ENERGY Learning tweet To be able to use the Kinetic Energy and Potential Energy Equations FORCES – MOTION - ENERGY Forces F = ma Force = mass x acceleration ? Motion Energy ? Kinetic Energy Energy of movement KINETIC ENERGY Learning Tweet To be able to relate the energy of an object to its motion ENERGY DEFINITION Energy is the capacity to do work One example of energy is gravitational potential energy POTENTIAL ENERGY (PE) Gravitational potential energy of an object is, Potential Energy = Weight x Height . GPE = (m.g).h Energy = Force x Distance Joules = Newtons x Metres Metric unit of energy is Joules. ENERGY CANNOT BE DESTROYED IT CAN ONLY BE CHANGED PE = 1200 J, KE = 0 J 6 kg 10 m PE = 600 J, KE = 600 J 20 m Roller Coaster PE = 0 J, KE = 1200 J Can calculate the kinetic and potential energy of a falling bowling ball CONSERVATION OF ENERGY Conservation of mechanical energy is (Potential Energy) + (Kinetic Energy) stays constant during motion. (as long as no energy is being converted to other forms) CONSERVATION ENERGY KINETIC ENERGY EQUATION Kinetic energy = ½ mass x velocity2 K.E = ½ mv2 OTHER TYPES OF ENERGY There’s also: Thermal energy Chemical energy Electrical energy Solar energy* Nuclear energy Total energy is conserved, once we account for the various different forms it can transform into. * Actually a form of electrical energy
"Kinetic Energy and the Highway Code"