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Q.

A force F has magnitude 15N. Direction of F is 37 degrees from negative x axis towards positive y axis. Represent F in terms of i^ and j^.

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a

9i^+12j^

b

-12i^+9j^

c

-15i^

d

-9i^+12j^

answer is B.

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Detailed Solution

Fx= 15cos (180-37) = -12 Fy= 15sin(180-37)= 9  Hence, F= -12i^+9j^
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A force F has magnitude 15N. Direction of F is 37 degrees from negative x axis towards positive y axis. Represent F in terms of i^ and j^.