P2 Unit 3 Lesson 1

Energy and work Lesson P2 3.1

Aim: Find out what work is and use the equation work done (J) = force (N) x distance (m)

Key words: work, joules, force, Newton, distance.

Starter: Some of the class are offered a fudge bar to eat. However having eaten the fudge bar they then have to use up the energy consumed by climbing some stairs outside the lab. We can work out how many times they have to climb the stairs using the equation work done = force x distance.
You will then need to take some notes about what has been discussed.

Main: Students attempt some practice examples of using the equation and then attempt the summary questions on pg 211 of the text book.

Plenary: Answers to the summary questions and examples are given, you should self assess your work. A brief class discussion will then take place to iron out any problems or misconceptions that may have arisen during the lesson.
Finally there will be a reminder about what happens to energy when work takes place using the example of a man riding a bike.

Homework: None set.

AQA Specification Link up Unit: Physics 2.13.3
· When a force causes a body to move through a distance, energy is transferred and work is done.
· Work done = energy transferred.
· The amount of work done, force and distance are related by the equation: work done = force applied x distance moved in the direction of force. Work done against frictional force is mainly transformed into heat.