Sorry for the problem being long but A person swims east to west across a river

Question

Sorry for the problem being long but

A person swims east to west across a river that is 30 meters wide.The person swims westward (compared to the water) at constant speedof 3 m/s. The river flows south at a steady speed of 5 m/s. Notethatm even though the person is swimming west compared to thewater, because of the current in the river, the actually have asouthwestern trajectory.

a. Determine the speed of the swimmer. (compared to the land)
b. Determine the total velocity of the swimmer compared to theland.
c. Determine the acceleration of the swimmer.
d. Determine the net force on the swimmer.
e. Determine how much time it takes the swimmer to cross theriver
f. Determine the coordinates of where they strike the other side ofthe river. Assume they start on the eastern shore at coordinates(0,0).

Explanation / Answer

The speed of the swimmer will just be the magnitude of thevector desribing his velocity which is -3i-5j assuming north ispositive j and east is positive i. so the magnitude of this is thesquare root of the sum of the squares. which is 5.830 m/s. To cross the river it simply will be 30 meters at 3m/s whichis 10 seconds. he will land 50m down stream because 10 seconds times the5m/s so the coordinates is x=-30 and y=-50 As for the acceleration and forces if everything is constantthen he is not accelerating and thus no forces. Not sure howyou want to go about that one. Hope this helps

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