How can forces acting on a system be represented both visually and algebraically?
How can Newton’s laws be modelled mathematically?
How can knowledge of forces and momentum be used to predict the behaviour of interacting bodies?
How do collisions between charge carriers and the atomic cores of a conductor result in thermal energy transfer?
How can knowledge of electrical and magnetic forces allow the prediction of changes to the motion of charged particles?
How are concepts of equilibrium and conservation applied to understand matter and motion from the smallest atom to the whole universe?
In which way is conservation of momentum relevant to the workings of a nuclear power station?
If experimental measurements contain uncertainties, how can laws be developed based on experimental evidence? (NOS)
What assumptions about the forces between molecules of gas allow for ideal gas behaviour? (NOS)
Newton’s three laws of motion
forces as interactions between bodies
that forces acting on a body can be represented in a free-body diagram
that free-body diagrams can be analysed to find the resultant force on a system
the nature and use of the following contact forces (normal force, frictional forces, elastic restoring force, viscous drag, buoyancy)
the nature and use of the following field forces (gravitational force, electric force, magnetic force)
that linear momentum as given by p = mv remains constant unless the system is acted upon by a resultant external force
that a resultant external force applied to a system constitutes an impulse J as given by J = FΔt where F is the average resultant force and Δt is the time of contact
that the applied external impulse equals the change in momentum of the system
that Newton’s second law in the form F = ma assumes mass is constant whereas F = Δp Δt allows for situations where mass is changing
the elastic and inelastic collisions of two bodies
explosions
energy considerations in elastic collisions, inelastic collisions, and explosions
Simulations:
Free body diagrams geogebra simulation
Vertical circular motion geogebra simulation
Files to support your learning for forces and energy:
Resource - Good practise Newton's laws questions
Presentation - Momentum and impulse
Presentation - Circular motion
Simulation: PhET rotational motion
Resource - Circular motion questions
Key diagram to be able to reproduce:
