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Answer to Question #18889 in Mechanics | Relativity for medo 055

Question #18889
A command post (O) monitors th movement of two ships in the gulf. At 1200 hrs a battleship (b) has bosition (-2i+10j)km relative to (O) and has constant velocity of (3i+2j)km/h , where i and j are unit vectors directed due east and due north respectively .

a)the captain of one ship has e been taken ill , show that the two ships will collide . the command post contacts the battleship and orders it to reduce its speed to move with velocity (2i+2j)km/h

b)find an expression for the vector [BF] at time t hours after noon

c)find the distance between B and F at 1400hrs

d)find the time at which F will be due north of B

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