If the vector B has a magnitude of 35.0 m and makes an angle of 60.0 degrees wit

Question

If the vector B has a magnitude of 35.0 m and makes an angle of 60.0 degrees with the +x axis, the vector -B

CHOOSE ONE OF THE FOLLOWING

A) has a magnitude of 35.0 m
B) has the same direction as vector B, but a magnitude of -35.0 m
C)makes an angle of -60 degrees with the +x axis
D)has the opposite direction of vector B and a magnitude of -35.0 m

Can somebody please help me choose the right answer and also explain why its that answer, I've been studying for physics for 3 hours and my brain has officially shutdown...

Explanation / Answer

the magnitude of a vector is unchanged when it is multiplied by -1

so

A . has magnitude 35 m <--------is the correct answer

magnitude is never negative

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