The stream of a river is flowing with a speed of 2 km/h
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
The stream of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h. What should be the direction of the swimmer with respect to the flow of the river to cross the river straight?
(1) 90∘
(2) 150∘
(3) 120∘
(4) 60∘