# PHY

What must be true for two vectors to add up to ZERO? Choose all that apply.
1)Their y-components must be equal.
2)They must be anti-parallel (point in opposite directions).
3) Their x-components must be equal.
4)They must be parallel (point in the same direction).
5) They must have equal magnitudes.
6) They must have opposite magnitudes

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1. 2 and 5

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posted by Damon
2. I will be happy to critique your thinking.

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3. What is wrong with 1 and 3?
What is wrong with 6 ?

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posted by Damon
4. All of the following apply: 1 ,2 , 3 ,
5 , 6.

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posted by Henry
5. No Henry, for example in #1 the components must be opposite, not equal.

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posted by Damon

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