AQA•GCSE•Combined Science
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Forces
Forces, motion, Newton's laws, and momentum
Practice 77 subtopics in Forces. All questions match the AQA GCSE specification.
About Forces
Forces is a key topic in the AQA GCSE Combined Sciencespecification. This topic covers forces, motion, newton's laws, and momentum.
Master all 77 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 (77)
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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: Force and extensionForce-extension graphsLinear and non-linear regionsElastic potential energy storedCalculating elastic potential energy (E = ½ke²)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: 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)Terminal velocity definitionForces on falling objectsAir resistance and speedReaching terminal velocityTerminal velocity examples (skydiving)Parachutes and terminal velocity
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