@sggupta:
that does seem so,but it's still an assumption.well,i was just pointing out that even if this is the case,there's nothing actually wrong with it,as one piece is a fantasy.well,putting my exaggerated example aside,many other factors like evnironment,tides etc can still be different,which would make things like sailing speed and water currents different,especially in grand line
Oh, I wasn't trying to argument against the speed of sailing or anything. There are hundreds and hundreds of parameters influencing the weather. The moon size, the amount of moons, the amount of water, the size of the planet, the rotation speed of the planet, the orbiting speed of the moons, the distance to other islands, the depth of the ocean. We simply cannot say what the weather is like on the planet One Piece is happening. Heck, the amount of moons alone is probably the reason, why the weather acts ridiculous all the time. We don't even know if the grandline is the equator of that planet.
I was just stating that indeed, newton's laws and the basics of our world physics apply to that world. No questions, no assumptions. It is so as shown in every single chapter.
People standing on the ground: newton's laws
Ship floating on water: newton's laws
Pushing the Birdcage: Newton's laws
Bubble shrinking when diving: newton's laws
things thrown into the sky by powerful forces: newton's laws
things falling: newton's laws
Coup de Burst making everyone cling to the boat otherwise they are thrown out by the force of their acceleration: newton's laws
heavy things breaking bones: newton's laws
Moons orbiting the planet: newton's laws
etc etc etc etc
it doesn't need to be stated to be true. Also there will never be an opportunity in which a character will break the fourth wall and say "By the way, yes, newton's laws apply to our world" as breaking the fourth wall is not part of that universe's rules. The One Piece universe has its rules, yes, but these also include the basic physics of our world.
But again, this doesn't mean, that waves and tides have the same speed as the waves and tides in our world, it just means that there are waves and tides. It also doesn't mean, that the humans in their world have the same capacities and abilities like the humans in our world (hinthint: they don't, otherwise Vivi wouldn't have any legs anymore to stand on). I just wanted to correct your statement, as you said, we cannot be sure if our world's physics apply to their world. But they do. In every way, except for devil fruit magic. But magic is magic. And maybe the dwarfs being so strong. Sure, if they could have super high density, but then it would be ridiculous to think, that Franky could hold more than 3.