Science Challenge – Physics
Forces: The Journey of a Pram
Use your knowledge and understanding of forces to explain the journey of this pram.
Imagine you are pushing the pram and need to catch a bus. The bus is at the bus stop, so you have to run, getting faster and faster. As you approach the bus, you slow down and finally stop.
Task
Draw force diagrams to show when it is:
- still (not moving)
- speeding up
- slowing down.
Key words
accelerate, balanced, decelerate, drag, friction, pull, push, reaction, slowing down, speeding up, unbalanced, weight
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To get level
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You might have:
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Bronze
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- Drawn a diagram to show when the pram is moving
- Drawn a diagram to show when the pram is still
- Identified where a force might be on the diagram
- Labelled a push or pull
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Silver
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- Drawn some force arrows to show when the pram is still, speeding up and slowing down
- Labelled most arrows with correct key words
- Identify some pairs of forces as unbalanced
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Gold
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- Drawn force arrows in pairs to show when the pram is still, speeding and slowing down
- Labelled force arrows using key words
- Identified pairs of forces as balanced or unbalanced, or arrows are clearly drawn to show this
- Estimated the size of the forces
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