Describe and explain what is happening in of changes in energy stores when a motor is used to raise a load. when various electrical appliances are in use. This should be restricted to appliances that can be run from standard laboratory power supply units. 6.1.1.2 The amount of energy associated with a moving object, or stored by an object can be calculated. Calculations to include kinetic energy, elastic potential energy and gravitational potential energy. Equations for kinetic energy and gravitational potential energy should be known. Calculate the kinetic energy of a moving object, stored by a stretched spring and an object raised above ground level. The kinetic energy of a moving object can be calculated using the equation: Kinetic energy, EK, in joules, J Mass, m, in kilograms, kg Speed, v, in metres per second, m/s The amount of elastic potential energy stored in a 2 Ask students to explore questions such as: When an object falls is the decrease in the gravitational potential energy store equal to the increase in the kinetic energy store? Calculate: Calculate the kinetic energy of a moving body. Calculate the amount of energy stored by various objects including stretched springs and objects raised above the ground. Calculation of an object’s speed given the kinetic energy of the object. Calculate the speed of an object, just before impact, when dropped Planning an approach. Selecting and managing variables: Determine the amount of energy stored in a spring. Investigate the efficiency of an electric used to lift a load by calculating the energy input from the power of the motor x time. The energy stored by the object can be found using: Obtaining and presenting primary evidence: Investigations looking into finding the speed of a trolley that travels down a ramp. Calculate the g.p.e. at the top of the ramp and the Gravitational potential energy: Gravitational to kinetic energy transfers: (links to other types of energy, calculations that can be done using Mini White Boards)
energy is being transferred or the rate at which work is done. Equations for power as the rate of transfer of energy or work done should be known. transferred or the rate at which work is done. Power, P, in watts, W Energy transferred, E, in joules, J Time, t, in seconds, s Work done, W, in joules, J An energy transfer of one joule per second is equal to a power of 1 watt. Evaluate the benefits and drawbacks of using lower power devices such as compact fluorescent lamps (CFLs). Calculations: Carry out calculations to determine power, using energy transferred divided by time and work done divided by time. students have by getting them to perform simple tasks. Examples could include walking up a flight of stairs, lifting masses up a known height and pulling an object across a floor. For each case the students need to know the work done and the time taken. To introduce the equation for work done by a section 6.5.2 needs to be covered. Obtaining and presenting primary evidence: Is mechanical power the same as electrical power? Demonstrate the difference in time taken when two different motors lift the same weight through at he same height.
6.1.3 National and global energy resources Spec ref. Summary of the specification content Learning outcomes What most students should be able to do Suggested timing (hours) Opportunities to develop Scientific Communication skills Opportunities to develop and apply practical and enquiry skills Self/peer assessment opportunities and resources Reference to past questions that indicate success 6.1.3 Energy Resources. Renewable and non-renewable energy resources. Describe the main energy resources available for use on Earth. These include: fossil fuels (coal, oil and gas) nuclear fuel bio-fuel wind hydro-electricity geothermal the tides the Sun water waves. Distinguish between energy resources that are renewable and energy resources that are Compare the ways that different energy resources are used. The uses to include transport, electricity generation and heating. 1 Define renewable energy resource and give examples of them. Define non-renewable energy resource and give examples of them. Describe the way in which different energy resources are used and identify patterns and trends in the use of energy resources. Research the different types of energy resources that are available to generate electricity. For each type of energy resource find the environmental impacts. Explain why each type of energy resource is used to generate electricity even though it does have these environmental impacts. For a given location determine the best way of generating electricity. Role-play a meeting between a of local councillors/MPs, local environmental groups and electricity companies trying to get a new power station built. Which Investigations into output of a model wind turbine or solar cell. clip GCSE Boardworks – Non Renewable, Renewable sections Mini White Boards based on teacher’s own questions or activities from Boardworks