What is the boat's velocity?

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since boat points 30 degrees downstream, problem involves 30-60-90 triangle. long leg of triangle perpendicular river banks, hypotenuse of triangle 30 degrees below horizontal , has magnitude, or length, 10.5, straight downstream leg of triangle need find before can answer question.

downstream portion side opposite 30 degree angle , know hypotenuse. trig ratio uses hypotenuse , opposite side sine. since sine = opposite/hypotenuse, length of opposite side (10.5)(sine 30) = 5.25. needs added river's velocity of 2.5 final velocity relative ground of 7.75 km/h.

a ferry boat riding @ relative speed water of 10.5km/h, points @ 30° angle downstream on river flowing @ 2.5km/h. boat’s velocity relative ground?


Science & Mathematics Physics Next



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