AQA AS PHYSICS MECHANICS TOP
FORECASTED EXAM 2 COMPREHENSIVE
STUDY SHEET 2026 SOLVED QUESTIONS
PREMIUM BUNDLE
◉ Acceleration.
Answer: Change of velocity per unit time.
◉ Activity of a Radioactive Isotope.
Answer: Number of nuclei of the isotope that disintegrate per
second.
◉ Becquerel (Bq).
Answer: Unit of radioactive activity, 1Bq = 1 disintegration per
second.
◉ Amplitude.
Answer: Maximum displacement from equilibrium of oscillating
object.
◉ Angular Displacement.
Answer: Angle an object in circular motion turns through in radians.
,𝜃 = 𝜔t
◉ Angular Speed (ω).
Answer: Rate of change of angular displacement of object in circular
motion.
𝜔 = 2𝜋f
◉ Annihilation.
Answer: When a *particle and its antiparticle meet*, they destroy
each other to *produce 2 photons of equal energy*.
Here the minimum energy of each photon produced = hf(min) = rest
energy of the particle.
◉ Antiparticle.
Answer: *Equal rest mass* and *equal and opposite charge* to
particle.
◉ Atomic Number, Z.
Answer: Number of *protons* in nucleus of atom.
◉ Avogadro Constant.
Answer: The *number of atoms in 12g of carbon-12*. Used to define
the mole.
,◉ Back emf.
Answer: The emf induced in the spinning coil of electric motor or in
any coil in which the current is changing. A back emf acts against the
change of applied pd.
◉ Background Radiation.
Answer: *Radiation due to naturally occurring substances* in the
environment e.g. radon gas, cosmic rays, ground and buildings.
◉ Binding Energy.
Answer: *Work done* to separate a nucleus into its *constituent
nucleons* (neutrons and protons).
E = mass defect x c²
◉ Binding Energy per Nucleon.
Answer: Average work done per nucleon to separate nucleus into
constituent parts. Higher the value, the more stable the nucleus.
*BE per nucleon = BE of a nucleus / mass number*.
◉ Boyle's Law.
Answer: For a *fixed mass of gas* at a *constant temperature*, its
*pressure x volume is constant*. Gases that obey this are an ideal
gas.
, ◉ Boltzmann Constant (k).
Answer: Molar gas constant divided by Avogadro number.
◉ Brittle.
Answer: Snaps without stretching or bending when subject to stress.
◉ Brownian Motion.
Answer: *Random and unpredictable motion of a particle* eg. smoke
particles caused by molecules of the surrounding substance colliding
with it. Provided evidence for existence of atom.
◉ Capacitance.
Answer: The *charge stored per unit pd of a capacitor*. Unit is Farad
(F) equal to 1 coulomb per volt. Q = CV.
◉ Centre of Mass.
Answer: Point through which a single force on the body has no
turning effect.
◉ Centripetal Force.
Answer: Resultant force on an object that moves along a circular
path. Acts towards centre of circle.
FORECASTED EXAM 2 COMPREHENSIVE
STUDY SHEET 2026 SOLVED QUESTIONS
PREMIUM BUNDLE
◉ Acceleration.
Answer: Change of velocity per unit time.
◉ Activity of a Radioactive Isotope.
Answer: Number of nuclei of the isotope that disintegrate per
second.
◉ Becquerel (Bq).
Answer: Unit of radioactive activity, 1Bq = 1 disintegration per
second.
◉ Amplitude.
Answer: Maximum displacement from equilibrium of oscillating
object.
◉ Angular Displacement.
Answer: Angle an object in circular motion turns through in radians.
,𝜃 = 𝜔t
◉ Angular Speed (ω).
Answer: Rate of change of angular displacement of object in circular
motion.
𝜔 = 2𝜋f
◉ Annihilation.
Answer: When a *particle and its antiparticle meet*, they destroy
each other to *produce 2 photons of equal energy*.
Here the minimum energy of each photon produced = hf(min) = rest
energy of the particle.
◉ Antiparticle.
Answer: *Equal rest mass* and *equal and opposite charge* to
particle.
◉ Atomic Number, Z.
Answer: Number of *protons* in nucleus of atom.
◉ Avogadro Constant.
Answer: The *number of atoms in 12g of carbon-12*. Used to define
the mole.
,◉ Back emf.
Answer: The emf induced in the spinning coil of electric motor or in
any coil in which the current is changing. A back emf acts against the
change of applied pd.
◉ Background Radiation.
Answer: *Radiation due to naturally occurring substances* in the
environment e.g. radon gas, cosmic rays, ground and buildings.
◉ Binding Energy.
Answer: *Work done* to separate a nucleus into its *constituent
nucleons* (neutrons and protons).
E = mass defect x c²
◉ Binding Energy per Nucleon.
Answer: Average work done per nucleon to separate nucleus into
constituent parts. Higher the value, the more stable the nucleus.
*BE per nucleon = BE of a nucleus / mass number*.
◉ Boyle's Law.
Answer: For a *fixed mass of gas* at a *constant temperature*, its
*pressure x volume is constant*. Gases that obey this are an ideal
gas.
, ◉ Boltzmann Constant (k).
Answer: Molar gas constant divided by Avogadro number.
◉ Brittle.
Answer: Snaps without stretching or bending when subject to stress.
◉ Brownian Motion.
Answer: *Random and unpredictable motion of a particle* eg. smoke
particles caused by molecules of the surrounding substance colliding
with it. Provided evidence for existence of atom.
◉ Capacitance.
Answer: The *charge stored per unit pd of a capacitor*. Unit is Farad
(F) equal to 1 coulomb per volt. Q = CV.
◉ Centre of Mass.
Answer: Point through which a single force on the body has no
turning effect.
◉ Centripetal Force.
Answer: Resultant force on an object that moves along a circular
path. Acts towards centre of circle.
