Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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 word$

Work occurs when a force causes an object to move in the direction of the force
Work is ONLY done when a force makes that object move
These 2 things must be present in order for work to be occurring object moves as the force is applied, and the direction of the objects motion is the same as the direction of the force applied
What is the work formula work equals force times distance
Power the rate at which work is done
What is the power formula power equals work done/time
Watt expressed in joules per second called watts
Work Input the work you do on a machine
Work Output the work done by the machine
When can work output be GREATER than work input NEVER
“Machines don’t save work”. True or false? Explain your answer they don’t they just decrease the amount of input force needed
Mechanical Advantage tells you how many times the machine multiplies force
Mechanical Advantage formula output force/input force
What are the 6 simple machines lever, inclined planes, wedges, wheel, pulley, screws
Lever consist of a bar that pivots from a fixed point, called a fulcrum
Examples of lever hammer, seesaw
Fulcrum the fixed point used by levers
Examples of each of the 3 classes of levers seesaw, bottle cap opener, barbells
Inclined Plane a straight slanted surface
How do you increase the mechanical advantage of an inclined plane making it longer
Examples of Inclined Planes ramps for bikes or skateboards
Wedge a double inclined plane that moves
Examples of Wedges a knife
Screws inclined plane wrapped in a spiral
Examples Screws a screw
How do you change the mechanical advantage of a screw the longer the spiral
Wheel & Axle two circular objects of different sizes
Examples of Wheel & Axle doorknob
Pulley grooved wheels that holds a rope or cable
Examples of Pulleys cranes
Created by: likeab0ss
Popular Physics sets




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:
restart all cards