Speed ratios Flashcards
(5 cards)
1
Q
What is speed?
A
distance an object travels in a given amount of time
2
Q
What is the speed ratio?
A
measure of how a machine affects speed.
3
Q
What is friction?
A
force that opposes motion, caused by the roughness of a surface
4
Q
What does friction decrease?
A
it decreases the MA but doesn’t affect the SR
5
Q
What is efficiency?
A
measure of how well a machine uses energy
