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Consider east as positive x-axis, north as positive y-axis and vertically upward direction as z-axis. A helicopter first rises up to an altitude of 100 m than flies straight in north 500 m and then suddenly takes a turn towards east and travels 1000 m east. What is position vector of helicopter?(Take starting point as origin)

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a

1000i^−500j^ +100k^

b

1000i^+500j^ −100k^

c

1000i^+500j^ +100k^

d

−1000i^+500j^ +100k^

answer is C.

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r^= 1000i^+500j^ +100k^

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Consider east as positive x-axis, north as positive y-axis and vertically upward direction as z-axis. A helicopter first rises up to an altitude of 100 m than flies straight in north 500 m and then suddenly takes a turn towards east and travels 1000 m east. What is position vector of helicopter?(Take starting point as origin)