A man is rowing a boat with a constant velocity `v_(0)` in a river. The contact area of boat is `'A'` and coefficient of viscosity is `eta`. The depth of river is `'D'` . Find the force required to row the boat.

A man starts rowing his stationary cuboidal boat of base area A=10m^(2) . The driving force on the boat due to rowing is 100N in the direction of motion. Find the maximum velocity that the boat can achieve. Also find the time in which he will attain half of this maximum velocity. [ Take coefficient of viscosity of water =15 poise ] The depth of the lake is 10m and the combined mass of man and the boat to be 150kg. (u=0 , velocity gradient uniform)

A man starts rowing his stationary cuboidal boat of base area A=10m^(2) . The driving force on the boat due to rowing is 100N in the direction of motion. Find the maximum velocity that the boat can achieve. Also find the time in which he will attain half of this maximum velocity. [ Take coefficient of viscosity of water =15 poise ] The depth of the lake is 10m and the combined mass of man and the boat to be 150kg. (u=0 , velocity gradient uniform)

River Man || River Boat Cases

The current velocity of river grows in proportion to the distance from its bank and reaches the maximum value v_0 in the middle. Near the banks the velocity is zero. A boat is moving along the river in such a manner that the boatman rows his boat always perpendicular to the current. The speed of the boat in still water is u. Find the distance through which the boat crossing the river will be carried away by the current, if the width of the river is c. Also determine the trajectory of the boat.

The current velocity of river grows in proportion to the distance from its bank and reaches the maximum value v_0 in the middle. Near the banks the velocity is zero. A boat is moving along the river in such a manner that the boatman rows his boat always perpendicular to the current. The speed of the boat in still water is u. Find the distance through which the boat crossing the river will be carried away by the current, if the width of the river is c. Also determine the trajectory of the boat.