Help check over my answers to these simple questions

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SUMMARY

The discussion centers on vector addition and the conditions under which the magnitude of the resultant vector is less than 4m. The user provided examples involving a car moving south at 2m/s with varying wind directions, confirming that the angle between the vectors must not be zero for the resultant magnitude to be less than 4m. The responses validate the correctness of the examples and emphasize the importance of understanding vector angles in physics.

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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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