Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
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 14 Vocab


work the product of force and distance
power the rate of doing work
joule the SI unit of work
watt the SI unit of power
horse power equal to 746 watts
machine device that changes a force
input force the force you exert on a machine
input distance the distance the input force acts in a machine
work input the work done on a machine as the input force acts through the input distance
output force the force exerted by a machine
output distance the distance an output force acts through in a machine
work output the work done by a machine as the output force acts through the output distance
mechanical advantage the number of times that a machine increases an input force
actual mechanical advantage the ratio of the output force to the input force in a machine
ideal mechanical advantage the mechanical advantage of a machine in the absence of friction
efficiency the percentage of the work input that becomes work output in a machine
lever the rigid bar that is free to move around a fixed point
fulcrum the fixed point a lever rotates around
input arm the distance between the fulcrum in a lever and the input force
output arm the distance between the fulcrum in a lever and the output force
wheel and axle a simple machine that consists of two rigidly attached disks or cylinders, each one with a different radius
inclined plane a slanted surface along which a force moves an object to a different elevation
wedge a v-shaped object whose sides are tow inclined planes sloped towards each other