Grade 11 General Science - Simple and Compound Machines Flashcards
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/6
Earn XP
Description and Tags
Vocabulary flashcards derived from Grade 11 General Science lecture notes on Ergonomics, Simple and Compound Machines, Efficiency, and the Mars Helicopter.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai | Chat |
|---|
No analytics yet
Send a link to your students to track their progress
7 Terms
Ergonomics
The science of work and a person's relationship to that work environment, derived from the Greek words ergon (meaning work) and nomoi (meaning natural laws).
Ergon
A Greek word meaning work, which forms part of the origin of the word ergonomics.
Nomoi
A Greek word meaning natural laws, which forms part of the origin of the word ergonomics.
Simple machine
A basic mechanical device with few or no moving parts that changes the direction or magnitude of a force.
Compound machine
A device that combines two or more simple machines working together to perform a single task.
Efficiency
The ratio of useful output to total input in a system, process, or machine, measuring how well a process minimizes the waste of energy, materials, or time.
Mars Helicopter
A small aircraft attached to the belly of the Perseverance rover that accomplished its first flight on April 19, 2021, operated for nearly three years, accumulated 128.8 minutes in the air, traveled a total of 10.5 miles (17.0 km), and reached heights up to 78.7 feet (24.0 m).