For many years as a locally competitive tennis player, David Glass carried an adjustable wrench in his tennis bag, to bring the net cord tension into a more playable range without knowing exactly how ...

Up, down, to the left and to the right…. – the servo hydraulic testing machine HB 100 of Zwick in Ulm considers all possibilities and performs both tensile/compression and torsion tests on helical ...

Some forces are called contact forces because they require objects to touch. One is tension force, found in stretched wires. Another is the force found in a spring. And last are resistive forces: ...