Simple Machines ended in 1998.
lever
A simple machine doesn't have any moving parts.
Simple machines are basic devices or mechanical powers on which other machines are based (eg, lever, wedge, pulley, wheel and axle, inclined plane, screw).
Fulcrum I think.
Simple machines are any device used to change the direction and or magnitude of a force. Levers, pulleys, wheels, and the inclined plane are all examples of simple machines.
A straw is not a simple machine. Simple machines are mechanical devices that change the direction of a force. A straw does not redirect the direction of the force.
Simple machines lets you trade force for distance, or the other way around. Or they change the direction of a force.
Do you mean "change"? If you're talking about "simple machines", the usual answers are direction (eg., with a pully), speed, and force.
machineAre you referring to simple machines?wikipedia.org/wiki/Simple_machinemachine
Simple machines are things that change the direction or magnitude of a force. A bicycle saddle doesn't do that, so no.
Simple machines usually decrease the amount of force needed and therefore making work easier. In some cases speed is traded like a baseball bat. It is called a third class lever. A simple pulley doesn't change the force but does change the direction.
An axel is a simple machine that relies on change in direction to make work easier. Furthermore, a simple machine is a device that makes work easier by increasing force or changing the direction of a force without electricity or other power sources.
No, a shelf support is likely a cantilevered beam, that is not a simple machine. Simple machines exploit leverage to increase or change the direction of force, a cantilevered beam merely supports a force.
oil
by levers
Simple machines help people lift and pull heavy objects. Simple machines like pulleys have been around for decades helping people work more efficiently.