Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 8 Vocabulary

WordDefinition
Work The transfer of energy to an object by using a force that causes the object to move in the direction of the force.
Joule The unit used to express energy,equivalent to the amount of work done by a force of 1N acting through a distance of 1m in the direction of the force. (symbol,J)
Power The rate at which work is done or energy is transformed.
Watt The unit used to express power, equivalent to joules per second. (symbol,W)
Machine A device that helps do work by either overcoming a force or changing the direction of the applied force.
Work Input The work done on a machine, the product of the output force and the distance through which the force is exerted.
Work Output The work done by a machine, the product of the output force and the distance through which the force is exerted.
Mechanical Advantage A number that tells how many times a machine multiplies force.
Mechanical Efficiency A quantity, usually expressed as a percentage, that measures the ratio of work output to input.
Lever A simple machine that consists of a bar that pivots at a fixed point called a fulcrum.
Pully A simple machine that consists of a wheel over which a rope, chain, or a wire passes.
Wheel and Axle A simple machine consisting of two circular objects of different sizes.
Inclined Plane A simple machine that is a straight, slanted surface, which facilitates the raising of loads.
Wedge A simple machine that is made up of two inclined planes and that moves, often used for cutting.
Screw A simple machine that consists of an inclined plane wrapped around a cylinder.
Compound Machine A machine made of more than one simple machine.
Created by: TabbGirl14
Popular Physical Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards