Science Chapter 5 - Key terms Flashcards
A machine made up of multiple simple machines
Mechanism
A Machine that requires the application of a simple force to do work
Simple Machine
A rigid bar that is supported at one point
Lever
The support point of the lever
Fulcrum
A lever that always has the fulcrum between input and output forces
First-class lever
A lever that always has the fulcrum at the end of the rigid bar
Second-class lever
A lever that has a part of us (usually a hand) as the fulcrum
Third-class lever
A ______ consists of a grooved wheel with a rope or cable looped around it
Pulley
A ______ consists of a shaft that is attached to a larger disk
The Wheel and Axle
A sloping surface on which an object can move
Inclined plane / ramp
An inclined plane wrapped around a rod
Screw
An inclined plane that travels through the object or material
Wedge
A group of physical parts that interact with each other and function as a whole in order to complete a task
Mechanical system
Measures the useful work done by the machine compared to the work needed to operate it
Efficiency of a machine
The work that the machine is designed to perform
Useful output work
