Homework Help: science

Posted by jo1475 on Sunday, July 1, 2012 at 5:17am.

a boat heading due north crosses a wide river with speed of 12km/h relative to the water the water in the river has a uniform speed of 5 km/h due east relative to the earth.determine the velocity of the boat relative to an observer standing on either bank and the direction of boat

science - ajayb, Sunday, July 1, 2012 at 5:43am
Do vector addition of the two velocities to obtain boat's velocity V w.r.t.river bank:

V = sqrt(12^2+5^2) = 13 Km/hr
and
tan theta = 5/12; (theta - angle between V and north)

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