Posted by **ami** on Sunday, August 22, 2010 at 6:46pm.

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

- PHY -
**Damon**, Sunday, August 22, 2010 at 6:50pm
2 and 5

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**bobpursley**, Sunday, August 22, 2010 at 6:50pm
I will be happy to critique your thinking.

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**Damon**, Sunday, August 22, 2010 at 6:56pm
What is wrong with 1 and 3?

What is wrong with 6 ?

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**Henry**, Sunday, August 22, 2010 at 7:31pm
All of the following apply: 1 ,2 , 3 ,

5 , 6.

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**Damon**, Monday, August 23, 2010 at 4:46pm
No Henry, for example in #1 the components must be opposite, not equal.

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