Topic 6.5 · 17 lessons
Forces
Scalars and vectors; weight, resultant forces and work done; springs; motion graphs; Newton's laws; stopping distances and momentum.
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Lesson 1: Forces, scalars and vectors
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Lesson 2: Weight and mass: W = mg explained
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Lesson 3: Resultant forces explained
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Lesson 4: Work done: W = Fs explained
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Lesson 5: Stretching springs: F = ke explained
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Lesson 6: Required practical: force and extension of a spring
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Lesson 7: Distance, speed and velocity: s = vt explained
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Lesson 8: Distance–time graphs explained
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Lesson 9: Acceleration and velocity–time graphs
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Lesson 10: Free fall and terminal velocity explained
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Lesson 11: Newton's First and Third Laws explained
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Lesson 12: Newton's Second Law: F = ma explained
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Lesson 13: Required practical: force, mass and acceleration
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Lesson 14: Stopping distances explained
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Lesson 15: Braking, energy and safety explained
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Lesson 16: Momentum: p = mv and conservation of momentum
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Lesson 17: Forces exam questions: 5 worked examples
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