#P7.1a
describe for situations where there are energy transfers in a system, that there is no net change to the total energy of a closed system (qualitative only)
the law of conservation of energy
#P7.1b
describe all the changes involved in the way energy is stored when a system changes for common situations
an object projected upwards or up a slope, a moving object hitting an obstacle, an object being accelerated by a constant force, a vehicle slowing down, bringing water to a boil in an electric kettle
#P7.1c
describe the changes in energy involved when a system is changed by heating (in terms of temperature change and specific heat capacity), by work done by forces, and by work done when a current flows
#P7.1d
make calculations of the energy changes associated with changes in a system, recalling or selecting the relevant equations for mechanical, electrical, and thermal processes; thereby express in quantitative form and on a common scale the overall redistribution of energy in the system
work done by forces, current flow, through heating and the use of kW h to measure energy use in electrical appliances in the home
#P7.1e
make calculations of the energy changes associated with changes in a system, recalling or selecting the relevant equations for mechanical, electrical, and thermal processes; thereby express in quantitative form and on a common scale the overall redistribution of energy in the system
work done by forces, current flow, through heating and the use of kW h to measure energy use in electrical appliances in the home
#P7.1f
calculate the amounts of energy associated with a moving body, a stretched spring and an object raised above ground level