1.5.1 Effects of forces
- Syllabus
- 0625–2026–2027
- Topic
- 1.5.1
- Level
- —
1.5.1.1—Forces may produce changes in the size
- Know: forces may produce changes in the size and shape of an object
1.5.1.2—Load–extension graphs for an elastic
- Sketch, plot and interpret load–extension graphs for an elastic solid and describe the associated experimental procedures
1.5.1.3—Resultant of two or more forces acting
- Determine the resultant of two or more forces acting along the same straight line
1.5.1.4—An object either remains at rest or
- Know: an object either remains at rest or continues in a straight line at constant speed unless acted on by a resultant force
1.5.1.5—A resultant force may change the
- State: a resultant force may change the velocity of an object by changing its direction of motion or its speed
1.5.1.6—Solid friction as the force between
- Describe solid friction as the force between two surfaces that may impede motion and produce heating
1.5.1.7—Friction (drag) acts on an object
- Know: friction (drag) acts on an object moving through a liquid
1.5.1.8—Friction (drag) acts on an object
- Know: friction (drag) acts on an object moving through a gas (e.g. air resistance)
1.5.1.9—Spring constant as force per unit
- Define spring constant as force per unit extension; recall/use: k = F/x
1.5.1.10—Term ‘limit of proportionality’ for a
- Define and use the term ‘limit of proportionality’ for a load–extension graph and identify this point on the graph (an understanding of the elastic limit is not required)
1.5.1.11—Recall/use: F = ma
- Recall/use: F = ma; know: the force and the acceleration are in the same direction
1.5.1.12—Circular motion caused by a force
- Describe circular motion caused by a force perpendicular to motion: (a) greater force increases speed if mass/radius stay constant (b) greater force decreases radius if mass/speed stay constant (c) greater mass needs greater force to keep speed/radius constant (F = mv^2/r not required)
Objective notes
12 learning objectivesConceptIGCSE Physics