Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
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

ILS Ch 14

Work apply force times distance, labeled in Joules
Power labeled in watts or horsepower, work divided by time, rate of doing work
Machine multiplies force, force and distance are inverse, can change direction of force
Work output can not be greater than work input, increased by reducing friction or increasing work input
Mechanical advantage output force divided by input force
IMA problem, pulley
Friction decreases efficiency
Efficiency never 100%, always less, some input force always lost to friction, work output divided by work input
Inclined plane increases distance, ramp
Wedge 2 inclined planes, axe, as thickness increases IMA decreases
Wheel and axle doorknob
Compound machine includes more than one simple machine, bicycle
Force only does work if it applied in the direction of the motion
Screw inclined plane wrapped around a cylinder
Levers 3 classes, gears are continuous levers
First class lever fulcrum in middle
Second class lever output force in middle
Third class lever input force in middle, IMA always less than 1
Math problems work, power, efficiency,
Created by: evroman