A motor boat is moving at a steady speed of` 20ms^(-1)`. If the water resistance on the boat is 6000 N, the power of the engine is ------------kW.

A motor boat is travelling with a speed of 3.0m / sec . If the force on it due to water flow is 500 N , the power of the boat is

A boat travels upstream at the speed of 20 km/h and downstream at the speed of 30 km/h. What is the speed of the boat.

A motor boat of mass m moves along a lake with velocity V_(0) . At the moment t=0 the engine of the boat is shut down. Assuming the resistance of water is proportional to the velocity of the boat vecF=-rvecv Q. How long the motor boat with the shut down engine.

A motor boat of mass m moves along a lake with velocity V_(0) . At the moment t=0 the engine of the boat is shut down. Assuming the resistance of water is proportional to the velocity of the boat vecF=-rvecv Q. The velocity (v) of the motor boat as a function of the distance (s) covered with the shutdown engine is

A person rows a boat in a water with a speed of 4 ms^(-1) . Water in the river is flowing with a speed of 2 ms^(-1) . If the person rows the boat perpendiculat to thedirection of flow, find resultant velcity of the boat and time taken by boat to cross the river if widthe of the river is 400 m .

A motor boat of mass m moves along a lake with velocity v_(0) . At t = 0, the engine of the boat is shut down. Resistance offered to the boat is equal to sigma v^(2) . Then distance covered by the boat when its velocity becomes v_(0)//2 is

A motor-boat of mass m moves along a lake with velocity v_(0) . At the moment t = 0 the engine of the boat is shut down. Assuming the resistance of the particle to-be proportional to the velocity of the boat F = - rv, find: (a) How long the motor boat moved with the shut down engine, (b) (b) The velocity of the motor boat as a function of the distance covered with the shutdown engine, as well as total distance covered till the complete stop. (c ) The mean velocity of the motor boat over the time interval (beginning with the moment t=0), during which its velocity decreases eta times.

The speed of a motor boat is 20 km/hr. For covering the distance of 15 km the boat took 1 hour more for upstream than downstream. What is the speed of current ?

A motor boat takes 12 hours to go downstream and it takes 24 hours to return the same distance. Find the ratio of the speed of boat in still water to the speed of stream