1,170 prompts matching "Spot my mistake calculating standard deviation"
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Final Revision: Reading the quartiles off a cumulative frequency curve
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Learn: The moment of a force about a point, and its units
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Worked Example: The sign convention for clockwise and anticlockwise moments
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Quiz: The principle of moments for a body in equilibrium
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Practice: A uniform beam resting on two supports
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Explain Back: Finding the reaction at each support of a loaded beam
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Show All Working: Replacing two parallel forces by a single resultant
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Final Revision: A ladder leaning against a wall, and the moments acting on it
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Learn: The velocity of one body relative to another
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Worked Example: Relative velocity when two bodies move along the same line
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Quiz: Relative velocity when the two motions are at right angles
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Practice: The triangle of velocities for a boat crossing a river
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Explain Back: The course to steer so that a boat crosses straight over
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Show All Working: The time at which two bodies are nearest one another
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Final Revision: Interception, where one body must catch another
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Learn: Two particles joined by a light inextensible string over a smooth pulley
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Worked Example: The common acceleration of two connected particles
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Quiz: The tension in the string joining two connected particles
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Practice: A particle on a smooth table connected to a hanging particle
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Explain Back: A particle on a rough table connected to a hanging particle
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