PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A man crosses a river in a boat. If he crosses the river in minimum time, he takes 10 min and drifts 120 m. If he crosses along the shortest path, he takes 12.5 min. Find
(1) the width of the river,
(2) the velocity of the boat with respect to water,
(3) the speed of the current.