hi everyone, i was doing my physics homework and i had problems in these 2 MC quesitons.(adsbygoogle = window.adsbygoogle || []).push({});

#1 A vector originally at a direction of 30°, when measured counter-clockwise with respect to the +x axis, is rotated a further 30° counter-clockwise.

The magnitude of the vector will ...

a.Increase by a factor of four

b.Increase by a factor of two

c.Remain the same

d.Decrease by a factor of two

e.Decrease by a factor of four

#2 The components of vector are Ex = +150 N/C and Ey = -100 N/C.

If we measure all angles with respect to the +x axis and counter-clockwise as the positive direction, the direction of is closest to:

a. -326°

b. -56°

c. -34°

d. +34°

e. +304°

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# Homework Help: Questions about Vectors.

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