Revision as of 01:23, 16 April 2009

Outcomes

Pupils can arrange all the GCSE quantities into two groups: scalars and vectors.
Pupils appreciate that force is a vector quantity and understand the nature of this.
Pupils can name and label forces on stationary objects using arrows (1-D and 2-D) and show that they are balanced.
Pupils can create a triangle of force vectors (2-D) from a trio of string pulling on a stationary loop to appreciate balanced forces.
Pupils can add force vectors that act along a line.

Students are split into groups and are given packs of cards with all the GCSE quantities written on them. They are asked to put them into two groups: 1) those that have a direction and can be represented with an arrow and 2) those that do not.
Introduce the words scalar and vector and discuss the quantities and which group they belong to.

Use the Balanced forces powerpoint. Discuss the images and have the class help label the forces using arrows. Guide them towards the correct direction of arrow and type of force as revision from the 3rd year. Begin looking for pairs of forces which are balanced and result in zero force on the object.

Use this Adding Forces sheet. Student should add forces along a line and may go onto an extension activity where they both label and add up forces for a number of situations.

Electrical Force - balloons for electrostatics, rice in a plastic bottle charging polythene rods and using watch glass show repulsion

A tank with water in it will be heavy and so is only to be moved by the technician; please refer to the Manual handling section of the Laboratory Lessons Health and Safety Risk Assessment
When using springs goggles must be worn
The main risk is from the vacuum pump and apparatus. The specific risk assessment must be read before using the apparatus.
General Laboratory Health and Safety Risk Assessment

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 ==Plenary==
-* Use this [[Adding Forces]] sheet.  Student should add forces along a line and my go onto an extension activity where they both label and add up forces for a number of situations.
+* Use this [[Adding Forces]] sheet.  Student should add forces along a line and may go onto an extension activity where they both label and add up forces for a number of situations.
 ==Homework==