Effort force - The force required to move the load., Mechanical advantage - Number of times by which a machine can increase or decrease the effort force., Velocity ratio - Ratio of the distance effort force moves, and the distance load force moves, Linkage - Two or more levers connected together, Gear train - Consists of two wheels with meshed teeth, Gear ratio - The ratio of the circumference of the gears, Friction - The force that resists the movement of objects sliding or rolling over one another, Block and tackle - Rope and pulley system, Pressure - The distribution of force over an area, Simple machine - A device composed of only one or two parts, that requires a single force to work, Fulcrum - The pivot point of the lever, Lever - A rigid bar that pivots at the fulcrum, Load arm - Part of the bar between the fulcrum and the object (load) you want to move, Rube Goldberg - A chain reaction-type machine or contraption intentionally designed to perform a simple task, Force - A push or pull on an object that may result in a change in the object's motion or shape, Input - All of the things that go into a system to make it work. May include forces, energy, and raw materials., Outputs - All of the tasks or services that the system performs, Systems thinking - Taking into consideration the inputs, outputs, and side effects of systems, Side effects - The unintended or undesired outputs of a system, Mechanism - A system of moving parts that changes an input motion and force into a desired output motion and force,

Structures and Mechanisms Definitions

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