For the given uniform semi-circular disc of mass m and radius r. Choose the correct alternative(s) :

Question

A river of width 100 m is flowing with a velocity of 1.5 m/s. A man start from one end with rest relative the river. He raws with an acceleration of 2 m/s² relative to the river. If the man want to cross the river in minimum time, by how much distance (in meters) will he be drifted (flown) in the direction of river flow during the crossing.

Answer 1

From A to B in y–direction,

From A to B, in x–direction,