1.3.1 WORK AND CONSERVATION OF ENERGY 0.0 / 5 ? PhysicsWork, Energy, PowerASOCR Created by: upsidedown1004Created on: 15-05-16 14:30 Define work done by a force product of the force and the distance moved by the force in the direction of the force 1 of 8 Define the joule work done when force of 1N travels through a distance of 1m 2 of 8 When is work done? when a force is moved past its point of application// energy is transferred // KE lost = work done + heat/sound energy 3 of 8 When is work not done? no movement, no work done // if force acts at right angles 4 of 8 What is the principle of conservation of energy? total energy of a closed system must be constant // energy is neither wasted or destroyed, it changes form // total energy of the universe is constant 5 of 8 What happens when an object is lifted? work is done against the force of gravity // transferred gravitational potential energy energy to the object 6 of 8 What is gravitational potential energy? energy possessed by an object due to its position or height above earth 7 of 8 How is GPE and KE related? GPE at top = KE at bottom // as object falls GPE is transferred to KE 8 of 8
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