4-FAD-03
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Contents
Outcomes
- Pupils investigate and can apply the principle of moments for a balanced object.
- Pupils investigate how the upward forces on a light beam varies with the position of a heavy object placed on the beam.
Specification References
- 1.25 recall and use the principle of moments for a simple system of parallel forces acting in one plane
- 1.26 understand that the upward forces on a light beam, supported at its ends, vary with the position of a heavy object placed on the beam
Starter
Main Body of Lesson
- Pupils apply the principle of moments for a set of 3 example questions given here, one example will test the idea that the mass acts from the centre of gravity Principle of moment example quesitons
- Bridge Investigation - Pupils investigate how the upward force on a light beam (bridge) varies with the position of a heavy object (truck) placed on the beam. The set up has a forcemeter on one end and a sting hold the other end. The pupils should produce a graph on how the force varies with the distance to the end.
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
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