A40000-mg ocean liner has an initial velocity of 4 km/h. neglecting the frictional resistance of the water, determine the time required to bring the liner to rest by using a single tugboat which exerts a constant force of 225 kn. (round the final answer to the nearest whole number.)

197.2 s

Explanation:

First of all, let's convert the mass of the ocean liner into kilograms:

and the initial velocity into m/s:

The force applied is

So we can find first the deceleration of the liner:

And now we can use the following equation:

with v = 0 being the final velocity, to find t, the time it takes to bring the liner to rest:

answer; equivalent to a one(1) horsepower motor;