To subtract a vector from another vector:

a. add the two vectors and make the result negative.
b. draw an arrow from the tail of the first vector to the head of the second.
c. draw an arrow from the head of the first vector to the tail of the second.
d. turn the arrow you are subtracting around, and then add.
e. put one on top of the other, put a minus sign by the lower one, and then subtract as if they were numbers.


d

Physics & Space Science

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Charge Q is distributed uniformly along a semicircle of radius a. Which formula below gives the correct magnitude of the force on a particle of charge q located at the center of the circle?

A.

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B.
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C.
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E.
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