In Young Earth Creationism isn't the earth supposed to be 6,000 and not 4,000 years old?
You have to take into consideration the flood, nearly everything died in the flood which means worldwide you have to start from scratch from the time noah got the boat unloaded.
Though that doesn't factor in that the animals would have died once they got off the boat as everything was cleansed so there was nothing for them to eat, then again with god magic the boat was not only big enough to hold all the animals and their years food it was big enough to hold two years food
Now some people might say that as the dimensions are given the size is fixed which proves that it cannot be true.
But as it is in the bible then it must be true and as the dimensions are there then it is scientificalasticy true as they wouldn't put in numbers if they didn't work.

The answer is simple. The ark was a tardis and noah came from a little village called gallifrey which was by what later became the sea of gallilee

This still leaves problems with motion, not like the problems of motion associated with "dad dancing" to spin me round like a record but other motions.
to scientificalicalculy explore these motions we need to look at the plank theory.
For this theory we will need some double sided sticky tape, a pen, a ruler, a pair of sharp scissors(adult supervision required) and some glitter.
oh and of course a piece of timber (not gopher wood please)as we cannot do the plank theory without a plank
ooops nearly forgot , as this is a complicated question we also need a chicken and an egg.

So then children, gather your materials and the fun experiment in the wonders of science will continue shortly.
one last thing , please boil the egg before you put it in the chicken or the lesson will get very messy right at the start.