AQA•GCSE•Physics
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Forces
Forces, motion, Newton's laws, momentum, pressure and terminal velocity
Practice 93 subtopics in Forces. All questions match the AQA GCSE specification.
About Forces
Forces is a key topic in the AQA GCSE Physicsspecification. This topic covers forces, motion, newton's laws, momentum, pressure and terminal velocity.
Master all 93 subtopics below with unlimited AI-generated questions. Each subtopic page includes sample questions and the ability to generate unlimited practice questions with detailed solutions.
All Subtopics (93)
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Scalar quantities (magnitude only)Vector quantities (magnitude and direction)Examples of scalars (speed, distance, mass, temperature, time)Examples of vectors (velocity, displacement, force, acceleration, momentum)Representing vectors as arrowsContact forces (friction, air resistance, tension, normal contact force)Non-contact forces (gravitational, electrostatic, magnetic)Weight as a force (gravitational force)Weight equation (W = mg)Mass vs weightGravitational field strength (g)Centre of massResultant force definitionAdding forces in same directionAdding forces in opposite directionsFree body diagramsBalanced and unbalanced forcesScale drawings for resultant forces (H)Resolving forces into components (H)Work done definitionWork done equation (W = Fs)Work done against frictionWork done and energy transferJoules as units of work and energyElastic deformationPlastic deformationExtension and force relationshipHooke's law (F = ke)Spring constantLimit of proportionalityRequired Practical 7: Force and extensionForce-extension graphsLinear and non-linear regionsElastic potential energy storedCalculating elastic potential energy (E = ½ke²)Turning effect of a force (moment) (T)Moment equation (M = Fd) (T)Principle of moments (T)Equilibrium and balanced moments (T)Levers as force multipliers (T)Gears and rotational motion (T)Pressure in fluids (T)Pressure equation (p = F/A) (T)Pressure in liquids (p = hρg) (T)Upthrust and floating (T)Atmospheric pressure (T)How altitude affects atmospheric pressure (T)Distance and displacementSpeed and velocityAverage speed calculationDistance-time graphsGradient of distance-time graph as speedVelocity-time graphsGradient of velocity-time graph as accelerationArea under velocity-time graph as displacementInterpreting motion graphsAcceleration definitionAcceleration equation (a = Δv/t)Newton's First LawInertia and massNewton's Second LawForce-mass-acceleration (F = ma)Required Practical 8: Investigating accelerationNewton's Third LawAction-reaction pairsApplying Newton's laws to calculationsStopping distanceThinking distanceBraking distanceFactors affecting thinking distance (speed, tiredness, drugs, distractions)Factors affecting braking distance (speed, road conditions, tyre conditions, brake conditions)Kinetic energy and brakingDangers of high speed (KE proportional to v²)Braking force and decelerationFriction and energy dissipation in brakesUniform acceleration equations (suvat) (H)v² = u² + 2as (H)s = ut + ½at² (H)Applying equations of motion (H)Momentum definition (H)Momentum equation (p = mv) (H)Conservation of momentum (H)Momentum in collisions (H)Momentum and Newton's Second Law (F = Δp/t) (H)Impact forces and safety features (H)Crumple zones and airbags (H)Impulse and change in momentum (H)Terminal velocity definitionForces on falling objectsAir resistance and speedReaching terminal velocityTerminal velocity examples (skydiving)Parachutes and terminal velocity
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