Forces in two dimensions
I can draw and interpret free body force diagrams to describe the resultant force on an object.
Forces in two dimensions
I can draw and interpret free body force diagrams to describe the resultant force on an object.
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Lesson details
Key learning points
- A free body diagram shows all of the forces acting on a single object.
- The resultant of two forces can be determined by adding individual forces on a vector diagram.
- The resultant of two perpendicular forces is in a different direction from either of these forces.
Keywords
Resultant force - A single force that represents the effect of all the forces acting on an object.
Equilibrium - The state of an object if there is no resultant force acting on it.
Vector diagram - A drawing in which forces are drawn end–to–end, and to scale, which can be used to find a resultant force.
Common misconception
The velocity of an object must be in the same direction as the resultant force acting on the object.
Invite pupils to consider situations in which the resultant force is not in the same direction as the velocity, such as an object that has been thrown upwards and is slowing down as its height increases.
To help you plan your year 11 physics lesson on: Forces in two dimensions, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 11 physics lesson on: Forces in two dimensions, download all teaching resources for free and adapt to suit your pupils' needs.
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Explore more key stage 4 physics lessons from the Forces make things change unit, dive into the full secondary physics curriculum, or learn more about lesson planning.
Equipment
1 cm squared paper.
Licence
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
