the friction from pushing the hull through the water is not useful as long as you're travelling.
Rowing a boat increases friction. The oars create resistance against the water, which generates friction that helps propel the boat forward.
Brakes are meant to have a lot of friction and it's useful.
No Friction Runes Computers
It can be useful when a ball is catching
how does friction help car tyres?
Sandpaper is high in friction but is not considered useful in terms of being helpful in a general sense.
stopping cars Friction is useful to start a fire with sticks.
Friction is useful when you are trying to stop a car, but not useful in the pistons of a car's engine (It makes them less efficient).
No, it is not. Rolling friction occurs when a round object rolls across a surface. A boat on the ocean is not in contact with any solid surface. Instead of rolling friction the boat is subject to drag.
It is useful
there is friction in your cars brake system and without that frictiuon there your car would roll away whenever it was on a hill so this is a good example of when friction is useful.
The brakes! And the tires (no friction = no traction).