Why can’t people open their car doors when they drive into a lake?
In: 20
Because the pressure of the water pushing onwards on the car is FAR greater than the pressure of the air in the car pushing out.
In day-to-day lives, the pressure is essentially equal, so there is little to no imbalance in force, so it is easy.
If you want to feel these forces, grab a plastic bag, put it over your hand, and try to hold your hand open (kind of like a claw) as you start putting your hand into a container of water (just make sure the water doesn’t spill into the bag). You will feel the pressure of the water pushing in.
As an extra extension, if/when you let the water rush over the top of the bag, filling it, the pressure will become balanced again and it will be easy to love the bag.
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