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What is the formula for a sphere? |
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Definition
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Multiplying a vector by a scalar (s) affects it how? |
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Definition
It increases or decreases the magnitude by a factor of s |
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What is the formula for the magnitude of a vector? |
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Definition
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How do you turn a vector into its unit vector form? |
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Definition
Divide the entire vector by the magnitude. |
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| For ever vector (except 0) there are 2 unit vectors. How? |
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Definition
They have a magnitude of 1 and -1 |
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| Solving a tension problem (when tensions cancel) that holds an object up |
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Definition
1) T1+T2=<0,mg>
2) Find θ using trigonometry
3) Find the tension vectors in terms of |T1| or |T2|
Tx = < ±|Tx|cos(θ) , |Tx|sin(θ) >
4) Add the two vectors so that the x coordinate cancels and you can set y equal to mg and solve
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