Is a jackknife a simple machine?

Answer 1

A jackknife is not classified as a simple machine; rather, it is a type of folding knife that features a blade that can be folded into the handle. Simple machines include devices like levers, pulleys, and inclined planes that make work easier by altering the direction or magnitude of force. While a jackknife may utilize some mechanical principles, it does not fall under the category of simple machines in physics.