P1 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: sophielouise277Created on: 09-09-18 17:25 What happens when an object falls? It gains speed and its store of GPE decreases and its store of KE increases 1 of 11 What happens when a falling object hits the ground without bouncing back? Its KE store decreases and some or all of its energy are transferred to the surroundings 2 of 11 What is the conservation of energy? Energy cannot be created or destroyed 3 of 11 What is the rule of a closed system? The total energy of the system is always the same before and after 4 of 11 What is work done? Energy transferred 5 of 11 What happens when an object moves up and down? The GPE increases when it goes up and decreases when it goes down 6 of 11 Why does the GPE of an object increase when it is lifted up? Because work is done on it to overcome the gravitational force 7 of 11 What does energy is dissipated mean? `Spread out to be stored in less useful ways 8 of 11 What happens as energy dissipates more and more? It gets less useful 9 of 11 How do machines waste energy? Friction between their moving parts, air resistance, electrical resistance and noise 10 of 11 How can machines be made more efficient? Reduce the energy they waste, e.g. lubrication 11 of 11
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