energy is being transferred or the rate at Evaluate the benefits and students have by getting transferred or the which work is done. drawbacks of using lower power them to perform simple rate at which work devices such as compact tasks. Examples could is done. fluorescent lamps (CFLs). include walking up a flight of stairs, lifting masses up a Equations for Calculations: known height and pulling an power as the rate Carry out calculations to determine object across a floor. For of transfer of each case the students need power, using energy transferred energy or work to know the work done and divided by time and work done done should be the time taken. divided by time. known. Power, P, in watts, W To introduce the equation for work done by a section Energy transferred, E, in 6.5.2 needs to be covered. joules, J Time, t, in seconds, s Obtaining and presenting Work done, W, in joules, J primary evidence: An energy transfer of one Is mechanical power the joule per second is equal to same as electrical power? a power of 1 watt. Demonstrate the difference in time taken when two different motors lift the same weight through at he same height.
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.
AQA-8464-SOW-ENERGY.DOCX