PHYSICS · Multi-part · CBSE · Physics · Motion in a Plane · Motion in a Plane
Problem
The width of a river is 30m, its velocity is 4ms−1, and the rowing speed of a boatman relative to water is 5ms−1.
(1) Make the velocity diagram for crossing the river in the shortest time. Then find this shortest time, the net velocity of the boatman, and the drift along the river.
(2) Can the boatman reach a point directly opposite on the other shore? If yes, make the velocity diagram, state the direction in which he should row, and find the crossing time.
(3) How long will it take him to row 10m upstream and then return to his starting point?