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Mathematics 7 Online
OpenStudy (ashley1nonly):

solved answer just need help understanding. A helicopter is to fly directly from a helipad at the origin in the direction of the point (1,1,1) at a speed of 60ft/sec. What is the position of the helicopter after 10 sec? u= (1/sqrt(3) I + 1/sqrt(3) j +1/sqrt(3) k -- got this from the unit vector r(t)= r0 + t(speed)u 0=t(60) ( (1/sqrt(3) I + 1/sqrt(3) j +1/sqrt(3) k) ----understand this part =20sqrt(3)t(I + j + K) ------How did we get this??

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