. A person attempts to cross a river in a straight line by navigating a boat at 15m/s. If the river flows at 5.0m/s from his left to right, what would be the magnitude of the boat's resultant velocity? In what direction would the boat go, relative to the straight line across it?

The magnitude and the direction the boat go, relative to the straight line

across it is 15.81 m/s and 18⁰ respectively.

= √ ( 15² + 5² )

= √ ( 225  + 25 )

= √250

= 15.81 m/s

If boat makes angle θ with direction of flow of river

Tanθ = 15/5 = 3

θ = 72⁰ approx.

Angle with straight line across it = 90 - 72 = 18⁰

Read more about Magnitude here link

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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