# physics

1.A car is traveling a road that includes two sides of an equilateral triangle with a constant speed s. What is the magnitude of the average velocity v of the car?

2.A ship crosses a river aiming at the angle theta to the left from the straight courses. The speed of the ship with respect to water is v' . The width of the river is d. What is the water speed u ( positive direction to the right), if the side displacement of the ship as it lands on the other shore is

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1. Time spent in motion = 2a/v
Displacement from starting point = a
Avg velocity = a/(2a/v) = v/2

Your second question is incomplete.

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