Physics questions and solutions
Browse original practice and official past-paper questions. Each question has its own link, with its source and worked solution.
498 questions · Page 2 of 21
- Q25 · 2025 QCAA · Paper 1 · 11 marksQuestion and worked solutionAn experiment was conducted by launching a ball with an initial velocity of at varying angles from the horizontal from a height of 1.0 m above the ground. The horizontal displacement was recorded to produce the graph shown.
- Q1 · 2025 QCAA · Paper 2 · 2 marksQuestion and worked solutionAn anti-hydrogen atom is composed of the anti-particles of the corresponding components of a hydrogen atom. A hydrogen atom contains one proton in the nucleus and one electron.Identify two components of an anti-hydrogen atom.
- Q2 · 2025 QCAA · Paper 2 · 5 marksQuestion and worked solutionA rock with a mass of 0.15 kg is tied to a piece of string and spun in a horizontal circle in the air.
- Q3 · 2025 QCAA · Paper 2 · 5 marksQuestion and worked solutionA spaceship travels at a velocity of towards a distant planet. The spaceship sends a light beam signal to the planet.
- Q4 · 2025 QCAA · Paper 2 · 8 marksQuestion and worked solutionAn energy level diagram for an atom is shown.
- Q5 · 2025 QCAA · Paper 2 · 5 marksQuestion and worked solutionThree point charges, A, B and C, are set up as shown.Determine the net force acting on charge B. Show your working.
- Q6 · 2025 QCAA · Paper 2 · 11 marksQuestion and worked solutionA current through a wire is coming out of the page.
- Q7 · 2025 QCAA · Paper 2 · 5 marksQuestion and worked solutionA satellite with a mass of 1500 kg orbits the Earth at a height of above the surface. The radius of the Earth is .
- Q8 · 2025 QCAA · Paper 2 · 4 marksQuestion and worked solutionA Feynman diagram is shown.
- Q9 · 2025 QCAA · Paper 2 · 5 marksQuestion and worked solutionDescribe the ladder in the barn paradox in special relativity. In your response, explain how it is resolved by frames of reference.
- Q1 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionWhich option describes a feature of baryons?
- Q2 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionWhich property of light is described by the postulates of special relativity?
- Q3 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionTwo objects with masses 65.0 kg and 75.0 kg respectively are separated by 1.50 m. What is the gravitational force of attraction between them?
- Q4 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionTwo experiments were conducted, and the following observations were made.Experiment 1 Light passing through a double slit produces a diffraction pattern.Experiment 2 Above a specific frequency, light incident on a metallic surface produces photoelectrons with discrete amounts of energy.Which statement can be supported by the observations?
- Q5 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionThe magnitude of the electrostatic force between two positively charged particles
- Q6 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionThe graph shows the relationship between the masses of different objects and the gravitational force they experience on an unknown planet’s surface.Determine the gravitational field strength for an object at the planet’s surface.
- Q7 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionAn object experiencing a gravitational force of 50.0 N moves down a frictionless incline of 40.0° to the horizontal. Calculate the net force acting on the object.
- Q8 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionAn object is pulled in two different directions as shown.What is the magnitude of the net horizontal force acting on the object?
- Q9 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionA passenger at the centre of a train moving at a relativistic speed switches on a light. According to the passenger, light travels outwards as shown.How would a stationary observer, watching the train pass by them, record this event?
- Q10 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionAn experiment was conducted to determine the force experienced by an 85 cm wire with a 2.4 A current flowing through it in an external magnetic field. It was rotated through varying angles within the magnetic field such that data analysis identified the relationship F = 0.0306 sin θ. What is the order of magnitude of the strength of the external magnetic fie…
- Q11 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionA planet orbiting a star has an orbital radius of 6.4 × 1014 m and completes a full revolution every 1.5 Earth years. What is the mass of the star?
- Q12 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionThe horizontal displacement of an object experiencing projectile motion was measured and recorded against the cosine of the launch angle (i.e. the angle up from the horizontal). The initial velocity was kept constant.What launch angle would cause the object to land from its starting position?
- Q13 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionLight with a frequency of 9.4 × 1015 Hz is incident upon an unknown metal, producing photoelectrons with a maximum kinetic energy of 5.6 × 10−18 J. What is the work function of the metal?
- Q14 · 2024 QCAA · Paper 1 · 1 markQuestion and worked solutionMagnetic flux density is a quantity related to the