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

work machines

Work and Simple Machines

Work is done when a force exerted on an object causes that object to move some distance; equal to force times distance; measured in joules.
Power rate at which work is done; equal to the work done divided by the time it takes to do the work; measured in watts.
Input Force force exerted on a machine
Output Force force exerted by a machine
Mechanical advantage number of times the input force is multiplied by a machine; equal to the output force divided by the input force
efficiency equals the output work divided by the input work; expressed as a percentage
simple machine a machine that does work with only one movement; includes the inclined plane, wedge, screw, lever, wheel and axle, and pulley.
compound machine machine made up of a combination of two or more simple machines
inclined plane simple machine that is a flat surface, sloped surface, or ramp
wedge simple machine consisting of an inclined plane that moves; can have one or two sloping sides
screw simple machine that is an inclined plane wrapped around a cylinder or post
lever simple machine consisting of a rigid rod or plank that pivots or rotates around a fixed point called the fulcrum
wheel and axle simple machine made from two circular objects of different sizes that are attached and rotate together
pulley simple machine made from a grooved wheel with a rope or cable wrapped around the groove
Created by: vahajuddin