Unit 7 · Force and Motion

Equations of Linear Motion Presentation

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Science and Technology, Class 9 · Unit 7

Equations of Linear Motion

Four equations · Five quantities · Two worked examples

Today's Objectives

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Derive v = u + at from the definition of acceleration

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Derive v² = u² + 2as and s = ut + ½at²

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Learn to pick the right equation for each problem

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Solve the runway and highway problems

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Presenter notes: Today we derive the four equations for an object moving in a straight line with uniform acceleration, and we use them on an aeroplane problem and a motorcycle problem.