How does a screw do work?
Machines that use screws to push against other objects are called presses. A press is used to make cider or wine by squashing fruit to extract the juice from it. Printing presses were also used to make books. The up and down force generated by a screw can also be used to hold things together.
(vulgar) A slightly less offensive version of fuck you. You'll just lie in your bed all day rather than help us? Well, screw you. Screw you—go annoy someone else! Screw you!
- Slang meaning "to copulate" dates from at least 1725, originally usually of the action of the male, on the notion of driving a screw into something. Meaning "defraud, cheat" is from 1900. First recorded 1949 in exclamations as a euphemism. Related: Screwed; screwing. To screw up "blunder" is recorded from 1942.
- With regard to the second part, whether I'm screwed is "used when someone tries to say they made a mistake": I think you're confusing I'm screwed (which as the comments tell you means approximately "Aw, jeez, I'm in trouble") with I screwed up, which does mean "I've made a mistake".
- Definition of mess up. informal. : to make a mistake : to do something incorrectly. About halfway into the recipe, I realized that I had messed up, and I had to start over.
Screwed over means someone does something to another person to leave them in a bad situation. For example, someone lying about another person or telling on another person so that they get in trouble is getting screwed over.
- A screw is a device which converts rotational forces into linear motion. A screw has a core about which is wrapped a spiral surface. In the surgical context, most screws have a screw-head, the function of which is discussed later. Most surgical screws are made of either stainless steel or titanium.
- Flag poles, fishing rods, cranes, window blinds, and wishing wells all have pulleys. The more pulleys that are rigged together, the more effective a pulley system can be. Pulleys, like all simple machines, sacrifice distance for force. The more distance the effort moves, the less force is needed to lift the load.
- In a Class One Lever, the Fulcrum is located between the Load and the Force. The closer the Load is to the Fulcrum, the easier it is to lift (increased mechanical advantage). Examples include see-saws, crow bars, hammer claws, scissors, pliers, and boat oars.
screw as a term for a prison guard is based on the fact that screw was originally slang for "key." One of the most important functions of a prison guard, or turnkey, as he's often called, is to see that prisoners are locked up at the appropriate times -- and that involves turning the "screw."
- The fulcrum/pivot point is the part of the lever that does not move, its in the middle. The resistance, or the downwards force, is the weight of the person you are trying to lift is at one end. The work, force applied to the lever, is the person sitting on the other end of the seesaw.
- A screw can also act to hold things together in some cases. Some examples of the uses of a screw are in a jar lid, a drill, a bolt, a light bulb, faucets, bottle caps and ball point pens.
- It is considered by some that the screw thread was invented in about 400BC by Archytas of Tarentum (428 BC - 350 BC). Archytas is sometimes called the founder of mechanics and was a contemporary of Plato.
Updated: 2nd October 2019