Help check over my answers to these simple questions

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The discussion confirms that the answers provided to the questions are correct. It emphasizes the importance of including actual examples to illustrate the concepts. Specific examples given include a car moving south with wind moving in the same and opposite directions. It also notes that for the resultant magnitude to be less than 4m, the angle between the two vectors must not be zero. Overall, the responses validate the correctness of the answers while highlighting key vector principles.
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EDIT: Thanks!
 
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1: Correct.
2: Don't you want actual examples?
a: A car moving directly south at 2m with wind moving directly south along with it at 2m.
b: A car moving directly south at 2m with wind moving directly north against it at 2m.
c: This cannot happen.
3: Correct.
 
They all look correct to me.

Though for the magnitude to be less than 4m you can say the angle between the two vectors should not be zero. Or the vectors should like at an angle θ.
 

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