PHYSICS- ENERGY 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: Izzy.258Created on: 27-05-17 19:52 WHAT CAN STRECHING OR SQUASHING DO TO AN OBJECT? CAN TRANSFER ENERGY TO ITS ELASTIC POTENTIAL ENERGY STORE. 1 of 21 HOW CAN THE ELASTIC POTENTIAL OF ENERGY STORE BE FOUND? Ee=1/2Ke2 . Ee= ELASTIC POTENTIAL ENERGY, K= SPRING CONSTANT, e= EXTENSION 2 of 21 WHAT DOES LIFTING AN OBJECT REQUIRE? IT REQUIRES WORK 3 of 21 WHAT DOES WORK CAUSE? A TRANSFER OF ENERGY TO THE GRAVITATIONAL POTENTIAL ENERGY. THE HIGHER THE OBJECT IS LIFTED, THE MORE ENERGY IS TRANSFERRED. 4 of 21 WHAT DOES THE AMOUNT OF ENERGY STORE DEPEND ON? THE OBJECTS MASS, HEIGHT AND STRENGTH OF THE GRAVITATIONAL FIELD THE OBJECT IS IN. 5 of 21 WHAT EQUATION FINDS THE CHANGE IN ENERGY? Ep=mgh. Ep= GRAVITATIONAL POTENTIAL ENERGY m=MASS, g= GRAVITATIONAL FIELD STRENGTH , h= HEIGHT. 6 of 21 KINETIC ENERGY IS ALWAYS... MOVING 7 of 21 WHEN IS ENERGY TRANSFERRED TO KINETIC ENERGY? WHEN AN OBJECT SPEEDS UP AND IS TRANSFERRED AWAY, WHEN AN OBJECT SLOWS DOWN. 8 of 21 WHAT DOES THE ENERGY IN THE KINETIC ENERGY STORE DEPEND ON AND WHY? IT DEPENDS ON THE OBJECTS MASS AND SPEED. THE GREATER ITS MASS AND THE FASTER ITS GOING, THE MORE ENERGY THERE WILL BE. 9 of 21 NAME AND DESCRIBE THE FORMULA FOR KINETIC ENERGY Ek=1/2mv2. Ek= KINETIC ENERGY MASS, m= MASS, v= VELOCITY(SPEED)2 10 of 21 WHAT IS ANOTHER WAY OF SAYING WORK DONE? ENERGY TRANSFERRED 11 of 21 HOW IS WORK DONE? IT CAN BE DONE WHEN CURRENT FLOWS OR A FORCE MOVES AN OBJECT. 12 of 21 WHAT TYPE OF WORK DONE IS THROWING A BALL IN THE AIR? FROM CHEMICAL ENERGY STORE IN THE PERSONS ARM TO KINETIC ENERGY STORE OF THE BALL AND ARM. 13 of 21 WORK DONE BETWEEN A CARS BREAKS AND THE WHEELS. FROM KINETIC TO THERMAL ENERGY STORE OF THE SURROUNDINGS. 14 of 21 GIVE AN EXAMPLE OF ENERGY BEING TRANSFERRED AWAY? SOUND WAVES AFTER A CRASH 15 of 21 NAME ALL 8 ENERGY STORES THERMAL, KINETIC, GRAVITATIONAL POTENTIAL, ELASTIC POTENTIAL, CHEMICAL, MAGNETIC, ELECTROSTATIC AND NUCLEAR. 16 of 21 NAME 4 WAYS ENERGY IS TRANSFERRED MECHANICALLY (FORCE DOING WORK), ELECTRICALLY, HEATING OR RADIATION. 17 of 21 WHAT DOES SYSTEM MEAN? A SINGLE OBJECT OR A GROUP OF OBJECTS 18 of 21 WHAT HAPPENS WHEN A SYSTEM CHANGES ENERGY IS TRANSFERRED 19 of 21 WHAT IS A CLOSED SYSTEM WHERE NEITHER MATTER NOR ENERGY CAN ENTER OR LEAVE. 20 of 21 WHAT IS THE NET CHANGE? THE TOTAL ENERGY OF A CLOSED SYSTEM IS ALWAYS 0. 21 of 21
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