Motion and relativity
Practise projectiles, momentum, circular motion, gravitation and special relativity.
Subtopics
Resolving motion into components
Use perpendicular vectors to describe a projectile before choosing motion equations.
Not attempted8 questionsHorizontal launches and drag
Connect vertical fall time to horizontal range and evaluate the no-drag model.
Not attempted8 questionsAngled launches and range
Model height, time, range and velocity while recognising the assumptions behind optimal angles.
Not attempted8 questionsImpulse and changing momentum
Use vector momentum changes and the area under a force–time graph.
Not attempted8 questionsMomentum conservation in two dimensions
Apply independent component balances to collisions and explosions.
Not attempted8 questionsRockets, ion thrusters and solar sails
Use momentum transfer to calculate rocket recoil and photon impulses.
Not attempted8 questionsUniform circular motion
Relate period, speed, inward acceleration and the actual forces that cause turning.
Not attempted8 questionsFlat and banked curves
Resolve real contact forces to explain road banking and its limits.
Not attempted8 questionsUniversal gravitation and field strength
Use inverse-square gravity and distinguish force from gravitational field strength.
Not attempted8 questionsCircular satellites and useful orbits
Derive orbital speed and connect orbit geometry with satellite uses.
Not attempted8 questionsKepler’s laws and orbital data
Interpret elliptical motion and use period–radius data to infer a central mass.
Not attempted8 questionsInertial frames and relativity postulates
Explain why high-speed measurements require a frame-dependent account of time and length.
Not attempted8 questionsTime dilation and particle lifetimes
Distinguish proper time from laboratory time and calculate fast-particle lifetimes.
Not attempted8 questionsLength contraction and relativistic momentum
Use frame-dependent lengths and momentum while avoiding photon and mass misconceptions.
Not attempted8 questions