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Physics · Combined Science

Forces

Spec 4.5 Paper 2 📗 Foundation

Subtopics

Scalar and Vector QuantitiesSpec 6.5.1.1Distinguish scalar and vector quantities and represent vectors with arrows. + Contact and Non-Contact ForcesSpec 6.5.1.2Classify forces as contact or non-contact and give examples of each. + GravitySpec 6.5.1.3Explain weight as gravitational force, distinguish mass from weight, and calculate using W = mg. + Resultant ForcesSpec 6.5.1.4Find the resultant of forces and relate it to the motion of an object. + Work Done and Energy TransferSpec 6.5.2Calculate work done by a force and understand it as energy transferred. + Forces and ElasticitySpec 6.5.3Apply Hooke's Law to springs and distinguish elastic from inelastic deformation. + Distance, Speed and VelocitySpec 6.5.4.1.1–6.5.4.1.3Define and calculate distance, displacement, speed and velocity. + Distance–Time GraphsSpec 6.5.4.1.4Interpret distance–time graphs and calculate speed from the gradient. + AccelerationSpec 6.5.4.1.5Calculate acceleration and use velocity–time graphs to describe and analyse motion. + Newton's Laws of MotionSpec 6.5.4.2.1–6.5.4.2.3State and apply Newton's three laws of motion. + Stopping Distance and BrakingSpec 6.5.4.3Define stopping distance and explain factors affecting thinking distance and braking distance. +

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Key Equations

W = mg

W = Fs

F = ke

Moment = Fd

p = F/A

s = vt

a = Δv/t

F = ma

p = mv

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