VISUAL FLOW
Figs. 1-4. The giant stride, or hurdy gurdy. The popular recreator. 1873.
Ben Shahn - Liberation (1945)
Levers Are Helpers
These children are lifting each other with their seesaw board. The board helps them lift. It is the kind of helper that is called a lever.
When you push down on one end of a lever, the other end lifts up. You can lift a much heavier load with a lever than you could lift without it.
These children are lifting each other with their seesaw board. The board helps them lift. It is the kind of helper that is called a lever.
When you push down on one end of a lever, the other end lifts up. You can lift a much heavier load with a lever than you could lift without it.