Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
The rate of doing work
|
power
|
|
a machine that changes motion
|
windmill
|
|
the force that is used to generate electricity
|
water falling from a dam
|
|
550 foot-pounds per second
|
1 horsepower
|
|
the force that makes things fall toward the earth
|
gravity
|
|
work in>work out
|
the work principle
|
|
metric measurement of work
|
newton-meter
|
|
the product of force times distance
|
work
|
|
work is accomplished only when an applied force ______ and object.
|
moves
|
|
The metric standard unit of work is the ________.
|
newton-meter
|
|
You cannot get ____ work out of a machine than what you put into it.
|
more
|
|
The forces that opposes motion in moving parts is _______.
|
friction
|
|
a push or pull on an object is _____.
|
force
|
|
Newton's discovery concerning how fast an object will change speed is the _____.
|
2nd law
|
|
Which law, described by Isaac Newton, reveals that the distance between two objects will affect the force between them?
|
Gravitation
|
|
with all machines the work output is _____ than work input
|
less
|
|
Some of the work input is always used to overcome ______ in a machine.
|
friction
|
|
Friction _____ work accomplished by machines.
|
reduces
|
|
Machines are never 100 percent efficient because some work is used to overcome _____ and _______.
|
friction
inertia |