Revision as of 05:27, 17 April 2009

Outcomes

Specification References

• 1.27 describe how extension varies with applied force for helical springs, metal wires and rubber bands
• 1.28 recall that the initial linear region of a force-extension graph is associated with Hooke's law
• 1.29 associate elastic behaviour with the ability of a material to recover its original shape after the forces causing deformation have been removed.

Starter

Main Body of Lesson

Plenary

• Set up a balloon which is electrostatically charged, on the ceiling, attach a string with a

Homework

• Labelling forces homework sheet
• file too large to upload - look in science shared

Additional Information

Resources Required

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

Textbook References

• None

Website References

• None

Skills Addressed

• Obtaining

Safety/Hazards

• 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

Notes

• None