Dizzy asked: How is it possible that if I drop a bowling ball and a tomato out of my second-storey window at THE SAME TIME, they will hit the sidewalk at the SAME TIME TOO?
Thank you for the question, Dizzy. We can thank Isaac Newton (1643-1727) for the answer to this question -- which I do not pretend to fully understand.
Basically put, gravity acts on things in our world: objects don't really "fall," they are pulled downward. The larger the object (and more mass) the more gravity pulls it.
Air resistance also acts on falling objects. The larger the object the more resistance it encounters.
A bowling ball is heavier, so it is pulled faster. However, being larger, it meets more air resistance, which slows it down.
A tomato is smaller, so it is pulled slower. However, being lighter it meets less air resistance, which does not slow it down as much.
These two situations balance each other, allowing them to hit the ground simultaneously.
Newton never came up with a law to cover the amounts of damage caused by such an experiment, so I suggest it only be attempted by professional bowlers and farmers.