body, resulting in an electric shock. 4.7.2.7 is defined as the rate at Define the term power. 1 Evaluate the benefits and Investigating Find Work done: which energy is transferred drawbacks of lower power out how much power Recall and apply these or the rate at which work is devices such as compact students have by getting equations. done. fluorescent lamps (CFLs). them to perform simple tasks. Examples could power = energy transferred ÷ Carry out calculations to include walking up a time determine power, using energy flight of stairs, lifting transferred divided by time and [P = E ÷ t] masses up a known work done divided by time. height and pulling an Power = work done ÷ time WS 1.2, MS 3b, 3c object across a floor. [P = W ÷ t] For each case the Recall and apply both of these students need to know power, P, in watts, W equations. the work done and the energy transferred, E, in time taken. joules, J Obtaining and time, t, in seconds, s presenting primary evidence: work done, W, in joules, J Is mechanical power the An energy transfer of 1 joule same as electrical per second is equal to a power? power of 1 watt.
body, resulting in an electric shock. 4.7.2.7 is defined as the rate at which energy is transferred or the rate at which work is done. power = energy transferred ÷ time [P = E ÷ t] Power = work done ÷ time [P = W ÷ t] 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 1 joule per second is equal to a power of 1 watt. Define the term power. Recall and apply these equations. 1 Evaluate the benefits and drawbacks of lower power devices such as compact fluorescent lamps (CFLs). Carry out calculations to determine power, using energy transferred divided by time and work done divided by time. WS 1.2, MS 3b, 3c Recall and apply both of these equations. Investigating Find out how much power 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. Obtaining and presenting primary evidence: Is mechanical power the same as electrical power? Work done:
AQA-8465-SOW-MAI.DOCX