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.
These resources will be removed by end of Summer Term 2025.
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.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
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
See additional materials.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
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.
