1,324 prompts matching "determine whether the argument 'if p then q; p; therefore q' is valid using a tr"
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Learn: The component of a force along a stated direction
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Practice: Choosing the most convenient pair of directions to resolve along
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Practice: The direction of the resultant of several coplanar forces
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Worked Example: Using the sine rule on the triangle of forces
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Practice: Why the forces must sum to nought in two perpendicular directions
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Learn: Choosing the point about which to take moments
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Worked Example: Drawing the polygon of forces to scale
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Practice: Limiting friction, and the greatest value it can reach
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Worked Example: The moment of a force about a point on its own line of action
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Worked Example: The total moment of three parallel forces about one end
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Worked Example: Matching each force to the sine of the angle opposite it
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Learn: Finding two unknown forces by Lami's theorem
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Learn: Finding the coefficient of a stated power in an expansion
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Practice: The probability of at least one success
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Learn: The probability that a normal variable lies between two values
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Practice: The components of a vector given its magnitude and direction
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Learn: The coordinates of a point in three dimensions
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Learn: The magnitude of a three-dimensional vector
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Practice: The magnitude of the sum of two vectors
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