1,312 prompts matching "Learn: Deriving the quadratic formula by completing the square"
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Worked Example: The tension in a stretched elastic string
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Quiz: The extension of a spring under a given load
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Practice: The difference between an elastic string and a spring in compression
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Explain Back: The elastic potential energy stored in a stretched string
I have just studied the elastic potential energy stored in a stretched string in my SS3 Fu
Common Mistakes: A particle oscillating on the end of an elastic string
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Spot my mistake: Assuming AB and BA give the same matrix
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Spot my mistake: Treating the kilogram and the kilogram weight as the same unit
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Spot my mistake: Adding the magnitudes of concurrent forces to get the magnitude of their resultant
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Spot my mistake: Assuming moments may only be taken about the pivot and never about another point
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Spot my mistake: Treating the rth term of a binomial expansion as the one carrying the rth power
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Spot my mistake: Treating the variance of a binomial distribution as its standard deviation
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Spot my mistake: Assuming the normal curve meets the horizontal axis at its points of inflexion
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Spot my mistake: Treating the dot product of two vectors as another vector
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Spot my mistake: Applying the power rule to the integral of one over x
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Spot my mistake: Reporting an area computed below the x-axis as a negative distance travelled
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Spot my mistake: Leaving out the constant of integration when velocity is found from acceleration
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Spot my mistake: Treating the action and the reaction of Newton's third law as forces acting on the same body
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Spot my mistake: Reading a strong correlation between two variables as proof that one causes the other
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Quiz me on 2x2 and 3x3 determinants together
Quiz me with two questions, one 2x2 determinant and one 3x3 determinant, mark both, and te
Structured question: three-part algebra question mixing methods
I am in SS 3. Give me a structured question where part (a) asks me to factorise a quadrati