Changing speed
I can describe how the speed of an object changes throughout the time that a resultant force is acting on it.
Changing speed
I can describe how the speed of an object changes throughout the time that a resultant force is acting on it.
Lesson details
Key learning points
- A resultant force can change the speed of an object.
- The speed of an object changes throughout the time a resultant force is acting on it.
- The greater the gradient (steeper the line) on a distance-time graph, the faster the movement.
Common misconception
Pupils can think that change in speed is instantaneous due to forces, not over a period of time.
Demonstrate that objects continue to accelerate while the force is acting. Make the force easy to understand (e.g. a pulling string).
Keywords
Resultant force - The overall effect of a set of forces acting on an object.
Speed - A measurement of how fast something is moving, found from the distance travelled divided by the time taken.
Dynamics trolley - A small wheeled cart used in motion experiments.
Acceleration - A change in speed or direction of movement.
Equipment
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
Exit quiz
6 Questions
The sum of forces on an object, accounting for direction.
The steepness of a line on a graph.
Distance divided by time.
A wheeled device used in motion experiments.
A change in speed.