Pearson Physics 12 New South Wales Skills and Assessment Book
These detailed notes are written based on each module to systematically answer extended responses with the right main points. I received a Band 6 for Physics in 2019 using this document. Notes include sample answering techniques to difficult and unexpected questions in the HSC Syllabus, preparing y...
Module 5 Extended Responses
Different Trajectories in Projectile Motion due to Air Resistance
Effects without Air Resistance
● The projectile travels with a constant vertical acceleration due to gravity
● The projectile has zero horizontal acceleration.
● There is equal time between reaching the peak of its height and falling back to the ground,
resulting in a parabolic path
Effects of Air Resistance
● With air resistance, there are three impacts on the projectile
○ The greater the velocity of the projectile, the greater the drag force
○ The more streamlined the projectile, the less the effects of the drag force
○ The higher the air density, the greater the drag force
● Thus, the projectile with air resistance takes longer to fall as its horizontal velocity decreases
and its descent is retarded by the drag force of air.
,Sliding Off a Banked Track
● A vehicle travelling at the design speed requires no friction to turn
● If the speed is increased past the design speed, a larger centripetal force will be needed to turn
● The horizontal component of the normal force will be less than the required centripetal force
● As there is no friction, the car slides off
Work Done in Circular Motion
● No work is done in circular motion
● The displacement and force vectors are perpendicular
● Using W=Fscosθ, this results in Fscos90 = 0
Geostationary Satellites
Characteristics of Geostationary Satellites
● The period of a geostationary satellite is 24 hours, equal to Earth’s orbital period
● Geostationary satellites are located on the equator
● Travel eastwards in the direction of Earth’s orbit
● Travel in a circular orbit
● Remains at the same point above the Earth’s surface
Applications of Geostationary Satellites
● Communications and Broadcasting
● Global Positioning System (GPS)
● Weather and Climate Monitoring
, Module 6 Extended Responses
Contribution of Maxwell to Electromagnetism and Subsequent Evidence
Maxwell’s Contributions
● Unified Electricity and Magnetism
○ Maxwell proposed that an accelerating charge would create an oscillating electric field,
giving rise to a perpendicular magnetic field. This would induce another electric field.
○ Mutually propagating electric and magnetic fields that unified both fields of physics
○ Can use a diagram to describe this form of propagation
● Predicted speed of light was constant
○ Maxwell described light to be an EM wave
○ His equations predicted that the speed of light was a constant value for all light
● Predicted forms of EM outside visible light
○ Using the wave equation, Maxwell predicted a whole range of EM waves
○ Predicted the existence of radio waves up to gamma rays
Experimental Evidence to Support Contributions
● Spark-Gap to produce Radio Waves
○ Hertz developed an apparatus to demonstrate the theory of EM wave propagation
○ An accelerating electric charge from one coil would induce an electrical spark to jump
across an air gap to another coil tuned as the same frequency
○ Discovery of radio waves
● Speed of Radio Waves
○ Hertz used the interference of radio waves to calculate their speed
○ Found that the speed of radio waves was the same as the speed of light
● Existence of other EM waves
○ Other EM waves from microwaves to gamma rays were then discovered
○ Applied in practical uses such as communications and medical imagery
Les avantages d'acheter des résumés chez Stuvia:
Qualité garantie par les avis des clients
Les clients de Stuvia ont évalués plus de 700 000 résumés. C'est comme ça que vous savez que vous achetez les meilleurs documents.
L’achat facile et rapide
Vous pouvez payer rapidement avec iDeal, carte de crédit ou Stuvia-crédit pour les résumés. Il n'y a pas d'adhésion nécessaire.
Focus sur l’essentiel
Vos camarades écrivent eux-mêmes les notes d’étude, c’est pourquoi les documents sont toujours fiables et à jour. Cela garantit que vous arrivez rapidement au coeur du matériel.
Foire aux questions
Qu'est-ce que j'obtiens en achetant ce document ?
Vous obtenez un PDF, disponible immédiatement après votre achat. Le document acheté est accessible à tout moment, n'importe où et indéfiniment via votre profil.
Garantie de remboursement : comment ça marche ?
Notre garantie de satisfaction garantit que vous trouverez toujours un document d'étude qui vous convient. Vous remplissez un formulaire et notre équipe du service client s'occupe du reste.
Auprès de qui est-ce que j'achète ce résumé ?
Stuvia est une place de marché. Alors, vous n'achetez donc pas ce document chez nous, mais auprès du vendeur zriley. Stuvia facilite les paiements au vendeur.
Est-ce que j'aurai un abonnement?
Non, vous n'achetez ce résumé que pour €5,06. Vous n'êtes lié à rien après votre achat.
