Question

Nan Nenu contents Grades Reservations Course Contents Backup 1 Question OS Done Out in: od 002:00 ou are planning to cross a river by a small motor boat. The speed of your boat is v = 2.93 m/s in still water. At which angle a with respect to the perpendicular crossing direction do you need to aim your boat, if you want to cross the river in the shortest possible distance? 01 The speed of the water is 1.09 m/s. (in deg) DA: 12DBAC 21.8 D 29.0 DER 38.6 OF 51.4 GH6DH 90/9 Submit Answer Tries 0/12 After a day of very heavy raining the level of the river rises up, and the speed of the water increases to 4.21 m/s. At which angle B with respect to the perpendicular direction do you need to aim your boat this time, if you want to cross the river in the shortest possible distance? (in deg) A210DB10,40C4410D264,0 D 9227134395.0 HR2027 St Aww Tries 0/12 Send Feedia Communication Blocked

Answer 1

ars; let width of river bed so to cover shortest distance d-( Vcosa) t for shortest distance cosa = V - 109 Vm 2.93 »T«= 68.39 2 similarly here Cosaß= um VA 2.93 4.21 »lß = 44.100