InThinking Physics UN: Cooper and PW: slphysics
​2.1 MOTION
Understandings:
  • Determine instantaneous and average blues for velocity, speed and acceleration
  • Solve problems using equations of motion for uniform acceleration (suvat)
  • Sketch and interpret motion graphs
  • Determine the acceleration of free fall experimentally
  • Analyse projectile motion, include the resolution of vertical and horizontal components of acceleration, velocity and displacement
  • Qualitatively describe the effect of fluid resistance on falling objects or projectiles, including reaching terminal speed
Applications and skills:
  • Diving and parachuting
  • Ballistics
  • Biomechanics
  • Quadratics
Guidance:
  • Calculations will be restricted to those neglecting air resistance
  • Projectile motion problems will only include values of g (9.81 m/s2)
Utilization:
  • Diving and parachuting
  • Ballistics
  • Biomechanics
  • Quadratics
Data booklet reference:​​​
Practice and review:
​2.2 FORCES
Understandings:
  • Objects as point particles
  • Free-body diagrams
  • Translational equilibrium
  • Newton’s laws of motion
  • Solid friction
Applications and skills:
  • Represent forces as vectors
  • Sketch and interpret free body diagrams
  • Describe the consequences of Newton’s first law for translational equilibrium
  • Use Newton’s second law quantitatively and qualitatively
  • Identify force pairs in the context of Newton’s third law
  • Solve problems involving forces and determine resultant force
  • Describe solid fiction (static and dynamic) by coefficients of friction
Guidance:
  • Students should label forces using commonly accepted names or symbols (ex. weight or force of gravity or mg)
  • Free-body diagrams should show scaled vector lengths acting from the point of application
  • Questions will be limited to constant mass
  • mg should be identified as weight
  • Calculations related to the determination of resultant forces will be limited to one- and two-dimensional situations
Utilization:
  • Motion of charged particles
  • Application of fiction in circular motion
  • Construction
  • Biomechanics

Data booklet reference:​​​​
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Practice and review:
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​2.3 WORK, ENERGY AND POWER
Understandings:
  • Kinetic energy
  • Gravitational potential energy
  • Elastic potential energy
  • Work done as energy transfer
  • Principle of conservation of energy
  • Efficiency
Applications and skills:
  • Discuss the conservation of energy within energy transformations
  • Sketch and interpret force-distance graphs
  • Determine work done include case where a resistive force acts
  • Solve problems involving power
  • Quantitatively describe efficiency in energy transfers
Guidance:
  • Cases where the line of action of the force and the displacement are not parallel should be considered
  • Examples should include force-distance graphs for variable forces
Utilization:
  • Energy is also covered in other group 4 subjects
  • Energy conversions are essential for electrical energy generation
  • Energy changes occurring in simple harmonic motion
​Data booklet reference:
Practice and review:
  • ​Hooke's Law Simulation on Phet
  • LoggePro graph - finding the spring constant
​2.4 MOMENTUM AND IMPULSE
Understandings:
  • Newton’s second law expressed in terms of rate of change in momentum
  • Impulse and force-time graphs
  • Conservation of linear momentum
  • Elastic collision, inelastic collisions, and explosions
Applications and skills:
  • Apply conservation of momentum in simple isolated systems including (but not limited to) collisions, explosions or water jets
  • Use Newton’s second law quantitatively and qualitatively in cases where mass is not constant
  • Sketch and interpret force-time graphs
  • Determine impulse in various contexts including (but no limited to) car safety and sports
  • Qualitatively and quantitatively compare situations involving elastic collisions, inelastic collisions and explosions
Guidance:
  • F = ma is equivalent to F = p/t only when mass is constant
  • Calculations relating to collisions and explosions will only be restricted to one-dimensional situations
  • A comparison between energy involved in inelastic collisions (in which kinetic energy is not conserved) and the conservation of (total) energy should be made​
Utilization:
  • Jet engines and rockets
  • Particle theory and collisions in martial arts
​Data booklet reference:
Practice and review:
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