A pulley is a simple machine using a wheel and a cord that's designed for lifting. A pulley is a simple machine using a wheel and a cord that's designed for lifting. Pulleys help make work easier by ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Curtis Pulley, who was dismissed from the University of Kentucky football team last fall only to resurface for a successful season at Florida A&M, is again cleaning up off-the-field troubles while ...