Early Use
The earliest remaining writings regarding levers date from the 3rd century BC and were provided by Archimedes. "Give me a place to stand, and I shall move the Earth with it" is a remark of Archimedes who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria).
It is assumed that in ancient Egypt, constructors used the lever to move and uplift obelisks weighting more than 100 tons.
Read more about this topic: Lever
Famous quotes containing the word early:
“If there is a price to pay for the privilege of spending the early years of child rearing in the driver’s seat, it is our reluctance, our inability, to tolerate being demoted to the backseat. Spurred by our success in programming our children during the preschool years, we may find it difficult to forgo in later states the level of control that once afforded us so much satisfaction.”
—Melinda M. Marshall (20th century)
“Early education can only promise to help make the third and fourth and fifth years of life good ones. It cannot insure without fail that any tomorrow will be successful. Nothing “fixes” a child for life, no matter what happens next. But exciting, pleasing early experiences are seldom sloughed off. They go with the child, on into first grade, on into the child’s long life ahead.”
—James L. Hymes, Jr. (20th century)