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Questions  

Ship A is travelling with a velocity of 5 kmh-1 due east. A second ship is heading 30° east of north. What should be the speed of second ship if it is to remain always due north with respect to the first ship?

a
10 kmh−1
b
9 kmh−1
c
8 kmh−1
d
7 kmh−1

detailed solution

Correct option is A

For B always to be north of A, the velocity components of both along east should be same.v2cos 60° = v1, v2= 10 kmh−1

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