Elon Musk goes behind-the-scenes at DOGE, unveils biggest source of fraud JP Morgan makes bold prediction for Social Security ...

Pulleys use mechanical advantage, similar to levers, to lift loads. Pulleys are wheel shaped with a groove that allows a cord or chain to sit inside the groove. A single pulley changes the ...

end of the lever, h, falls into the notch, where it is firmly held by the s pri n g, i. By drawing the co rd, k, the belt is shifted back upon the tight pulley, B. Behind the levers, !I a n d h ...