500 prompts matching "Physics at work: Electrical machine manufacture"
Practice set: Efficiency, and why no machine is perfect
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Spot my mistake: Assuming a machine can be one hundred per cent efficient
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Worked example: Reading a vernier scale correctly
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Exam prep: Distance-time relationships in a straight line
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Spot my mistake: Treating distance travelled as though it were displacement
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Practice set: Acceleration and retardation
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Exam prep: The equations of uniformly accelerated motion
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Spot my mistake: Using an equation of motion when the acceleration is not uniform
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Practice set: What circular motion is, and what keeps a body in it
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Exam prep: Centripetal force and centripetal acceleration
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Spot my mistake: Treating centrifugal force as though it were a real force
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Worked example: Adding two vectors by the parallelogram rule
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Let me explain: The conditions under which no work is done
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Practice set: What energy is, and the forms it takes
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Exam prep: The joule, and the units of work and energy
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Spot my mistake: Assuming work is done whenever a force is applied
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Real-life Nigeria: Work done in everyday Nigerian tasks
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Practice set: The conservation of mechanical energy
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Exam prep: Energy transformations in a falling body
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Spot my mistake: Forgetting to square the velocity in a kinetic energy calculation
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