It's easier to follow rules when you know why they exist. In this case, you can calculate the force of an object hitting a melon to see why hard hats matter.
from Science Latest https://www.wired.com/story/the-physics-of-a-bolt-smashing-a-watermelon-or-your-brain
from Science Latest https://www.wired.com/story/the-physics-of-a-bolt-smashing-a-watermelon-or-your-brain
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