Why Does Energy Dissipate When a Tug's Cable Breaks?

[damienr]

Homework Statement

If a tug is pulling a ship and its cable pops it is observed that the tug speeds up while the ship slows down, explain what principle is observed and why energy is NOT conserved.

Homework Equations

The Attempt at a Solution

Principle Of moments and i don't know why energy is NOT conserved

 

[berkeman]

Homework Statement

If a tug is pulling a ship and its cable pops it is observed that the tug speeds up while the ship slows down, explain what principle is observed and why energy is NOT conserved.

Homework Equations

The Attempt at a Solution

Principle Of moments and i don't know why energy is NOT conserved

Don't think moments are involved, but I could be missing something.

Start by thinking of both objects being on a frictionless plane, and you cut the rope...

Then add in friction and think about what happens.

Is water anything like friction?


EDIT -- Welcome to the PF, BTW!