Physics 9

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4.2 Addition of Forces Head to Tail Rule

4.3 Resolution of Forces Determination of a force from its Perpendicular Components

4.4 Torque Or Moment of a Force Rigid BodyAxis of RotationLine of Action of a ForceMoment Arm



4.7 Centre of Gravity Centre of gravity of an irregular shaped thin laminaExperiment


4.9 Equilibrium Conditions for EquilibriumFirst Condition for EquilibriumSecond Condition for EquilibriumStates of EquilibriumStable EquilibriumUnstable EquilibriumNeutral Equilibrium