GENSCI: MACHINE

Machine

anything that reduces effort and saves time

Simple macine

a mechanical device that changes the direction or magnitude of a force using a single, basic mechanism. They are the fundamental building blocks

Mechanical Advantage

Allows you to use less force over a longer distance to move a heavy load.

Lever

A rigid bar pivoting ona fucrum (e.g. a crowbar)

Wheel and Axle

A circular frame turning on a central shaft (e.g. door knob)

Pulley

A wheel with a grooved rim for a rope or chain (e.g, a flagpole hoist)

Inclined plane

A flat, sloped surface (e.g., a loading ramp)

Wedge

Two inclined planes joined back-to-back, used to split or lift (e.g., an axe)

Screw

An inclined plane wrapped around a cylinder (e.g, a Jar lid)

Compound Machine

A device made up of two or more simple machines working together

Weight

Tge gravitational pull of an objedct. This is almost always a load; what you are trying to lift.

Tension

The pulling force that travels through strings, ropes, or chains. It acts as the “messenger". (it pulls equally in both directions)

Torque

the force that causes rotation “force with a handle”

Friction

The force that resists motion. The “tax”