Science at key stage 3 (Year 9)
Unit 9K: Speeding up
Section 7: b. How can we increase speed?
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Objectives |
| Children should learn: |
- that air and water resistance increase with increasing speed
- that the energy required to keep a moving object moving depends on air resistance
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Activities |
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Outcomes |
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Children: |
- Establish with pupils that air resistance increases with speed, eg by reference to experiences of walking and running while carrying a large piece of card or an open umbrella carried horizontally, and compare data on fuel consumption of cars at different speeds. Remind pupils that fuel consumption (on a horizontal road) relates to overcoming resistive forces, not to keeping cars moving.
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- describe differences in the effect of air resistance when walking or running
- identify that fuel consumption for a particular vehicle is greater at greater speed and relate this to air resistance
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Points to note |
- At key stage 2, pupils are likely to have considered the effects of air resistance on themselves when running, and investigated the effect of shape on movement through a liquid.
- Extension: ask pupils to find information on, and draw inferences from, the relative performance of cars in relation to streamlining and fuel consumption.
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This unit is divided into sections. Each section contains a sequence of
activities with related objectives and outcomes. You can view this unit by
moving through the sections or print/download the whole unit.
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