A force can cause a resting object to move, or it can accelerate a moving object by changing the objects speed or direction
The beam is acting as the pivot and the weight of the deck acts through its center its gravity, at the midpoint of the deck.
Center of gravity at: (16 + 4)/2 = 10 ft
Converting 4 ft to meters: 1.22 m
Converting 10 ft to meters: 3.05
F x 1.22 = 3.05 x 3000 x 9.81
F = 73,600 N
It means that if the mass of a mass is increased by some factor, and nothing else changes, then the weight of that mass increases by exactly the same factor.
A fossil, in my opinion, is basically looking back in time when you see it. It's the bones of remains of an animal or organism that lived long ago, preserved in the ground through Earth's natural processes and dug up by paleontologists.
Hope this helped!
