500 prompts matching "Adding resistances wrongly in a series problem"
Spot my mistake: Assuming friction always opposes useful motion
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Real-life Nigeria: Reducing friction in Nigerian machinery
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Worked example: Finding acceleration from a velocity-time graph
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Spot my mistake: Using an equation of motion with the wrong sign for deceleration
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Real-life Nigeria: Describing a Nigerian bus journey with a motion graph
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Worked example: Calculating the acceleration produced by a given force
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Spot my mistake: Pairing forces acting on the same body as action and reaction
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Real-life Nigeria: Newton's laws in Nigerian road safety
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Worked example: Calculating the impulse delivered in a collision
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Real-life Nigeria: Crumple zones and safety in Nigerian vehicles
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Worked example: Calculating the efficiency of an energy transfer
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Spot my mistake: Describing energy as being used up
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Real-life Nigeria: Solar energy in Nigerian homes
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Worked example: Calculating the mechanical advantage of a lever
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Spot my mistake: Assuming a machine can be one hundred per cent efficient
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Real-life Nigeria: Simple machines on Nigerian farms and in workshops
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Worked example: Calculating the heat needed to boil a mass of water
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Spot my mistake: Assuming evaporation happens only at the boiling point
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Real-life Nigeria: Cooling by evaporation in Nigerian daily life
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Worked example: Calculating the increase in length of a heated rod
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