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27 March, 17:14

Car A travels along a freeway at 110kmh-1 going east. Car B, travelling west at 120kmh-1 spins out of control and veers towards Car A (across the median strip) at an angle 30° off course. a. What is the velocity of Car B relative to Car A?

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  1. 27 March, 17:42
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    To calculate the velocity relative to car A, you have to add the opposite of the velocity of car A to car B.

    the velocity of car B relative to car A:

    (let east and north directions be positive)

    v = v (car B) - v (car A)

    v (east-west direction) = - 120 * cos 30° - 110

    v (north - south direction) = - 120 * sin 30° - 0
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