Simple machine Flashcards
What is efficiency?
The ratio of work output to the work input of a machine
What is a compound machine?
A machine that is a combination of 2 or more simple machines
What is the resistance arm?
The distance from the resistance force to the fulcrum of a lever
What is effort force?
The force that is applied to do work
What is a fixed pulley?
A pulley that is attached to something that does not move
What is a fulcrum?
The fixed point of a lever
What are gears?
Interlocking toothed wheels of a machine
What is effort arm?
The distance from the effort force to the fulcrum of a lever
What is an inclined plane?
A simple machine that has a sloping surface that is longer than its vertical side
What is a joule?
A unit of work equal to one Newton-meter
What is a lever?
A simple machine that consists of a bar that turn or pivots, around a fixed point
What is the resistance distance?
The distance that a resistant force moves
What is mechanical advantage?
The number of times a machine multiplies an effort force
What is power?
The amount of work done over a period of time
What is a pulley?
A machine that is made up of a rope that turns around a wheel
What is the resistant force?
A force that opposes motion
What is a simple machine?
A device that changes the size or direction of a force being used to do work
What is a wheel and axle?
A simple machine that consists of two wheels that turn around the same pivot
What is work?
Using force to move an object through a distance
What is ideal mechanical advantage?
The calculation of mechanical advantage based on effort and resistance distances (it ignores friction)
What are the three parts of a lever?
The fulcrum, effort arm, and the resistance arm
What are the six simple machines?
Inclined plane (ramp)
Pulley (elevator, curtains, flagpole, Eric)
Wheel and axle (steering wheel, door handle)
Wedge (door stop, knife, cheese)
Screw (bottle cap)
Lever (see-saw, light switch)
What is actual mechanical advantage?
The calculation of mechanical advantage based on effort and resistance forces
How many watts are in kilowatts?
1000
