Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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
Know
remaining cards
Save
0:01
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:
Retries:
restart all cards
share
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

IGHS Winkels

Physical Science Chapter 14

TermDefinition
Work the product of force and distance Work=force x distance
Joule is the SI unit of work
Power the rate of doing work Power = Work/Time
Watt the SI unit of power which is equal to one joule per second
Horsepower one hp is equal to about 746 watts
Machine is a device that changes a force
Input force the force exerted on a machine
Input distance the distance the input force acts acts through
Work input the work done by the input force acting through the input distance
Output force the force that is exerted by a machine
Output distance the distance the output force is exerted through
Work output of a machine is the output force multiplied by the output distance
Mechanical Advantage of a machine is the number of times that the machine increases an input force
Actual Mechanical Advantage AMA=Output force/Input force
Ideal Mechanical Advantage the mechanical advantage in the absence of friction IMA=Input distance/Output distance
Efficiency the percentage of the work input that becomes work output E=Work output/Work input x 100%
Lever a rigid bar that is free to move around a fixed point
Wheel and axle simple machine that consists of two 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 V-shaped object whose sides are two inclined planes sloped toward each other
Screw an inclined plane wrapped around a cylinder
Pulley a simple machine that consists of a rope that fits into a groove in a wheel
Compound machine a combination of two or more simple machines that operate together
Fulcrum the fixed point the bar rotates around (lever)
Input arm (of a lever) the distance between the input force and the fulcrum
Output arm (of a lever) the distance between the output force and the fulcrum
Created by: Winkels