Measuring speed: practical
I can accurately measure the average speed of a trolley moving down a ramp.
Measuring speed: practical
I can accurately measure the average speed of a trolley moving down a ramp.
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Lesson details
Key learning points
- A ramp will produce a force that allows a dynamics trolley to roll down it.
- The average speed of the trolley can be found from distance and time measurements.
- Counting down ‘3, 2, 1, go’ helps start a stopwatch at the right moment.
- Observing with eyes in line with the finish line helps stop a stopwatch at the right moment.
Keywords
Dynamics trolley - A small wheeled object used to investigate movement.
Gradient - The steepness of a slope, the larger the gradient the steeper a slope is.
Timer - A device used to precisely measure time, usually to 0.1 s or 0.01 s.
Metre rule - A simple length measuring instrument.
Average speed - The overall distance travelled divided by the overall time for a journey.
Common misconception
Pupils may think that the constant force on the trolley will cause it to move at a constant speed.
Demonstrate that the trolly speeds up as it rolls, by finding speed near the start and near the end of the ramp.
To help you plan your year 8 science lesson on: Measuring speed: practical, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 8 science lesson on: Measuring speed: practical, download all teaching resources for free and adapt to suit your pupils' needs.
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Explore more key stage 3 science lessons from the Moving by force unit, dive into the full secondary science curriculum, or learn more about lesson planning.
Equipment
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Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
A wheeled object used to investigate motion.
A measure of the steepness of a slope or ramp.
A device used to measure time.
A device used to measure length.
Overall distance travelled divided by overall time taken.
