Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Ch 4: Work and Machi

Ch 4 Vocabulary

QuestionAnswer
Force exerted on an object that causes it to move. work
A unit of work equal to one newton-meter. joule
A device that changes the amount of force exerted or the direction in which the force is exerted. machine
The force exerted on a machine. input force
The force exerted on an object by a machine. output force
The number of times the force exerted on a machine is multiplied by the machine. mechanical advantage
The percentage of input work that is converted to output work. efficiency
The mechanical advantage that a machine provides in a real situation. actual mechanical advantage
The mechanical advantage that a machine would have without friction. ideal mechanical advantage
In order for you to do ____________ on an object, the object must move some distance as a result of your force. work
The amount of work done on an object can be determined by multiplying force times ________________. distance
Sometimes called the effort force. input force
Sometimes called the resistance force, because the machine must overcome some resistance. output force
The ratio of output force to input force. mechanical advantage
For a machine that multiplies force, the mechanical advantage is greater than 1
For a machine that multiplies distance, the mechanical advantage is less than 1
For a machine that only changes the direction of the force, the mechanical advantage will be one
In order for you to do work on an object, the force you exert must be in the same ___________ as the object's motion. direction
Three ways in which a machine can make work easier are; multiplying the input force, increasing the output distance, or by changing the ____________ of the input force. direction
The amount of work you do when you exert a force of 1 newton to move an object a distance of 1 meter. joule
A flat surface with one end higher than the other. inclined plane
An inclined plane that moves. wedge
An inclined plane wrapped around a central cylinder to form a spiral. screw
A rigid object that pivots about a fixed point lever
The fixed point around which a lever pivots. fulcrum
Two circular or cylindrical objects that are fastened together and rotate about a common axis. wheel and axle
A grooved wheel around which is wrapped a rope, chain, or cable. pulley
A device that combines two or more simple machines. compound machine
Two or more wheels linked together by interlocking teeth. gears
A band of connective tissue that attaches a muscle to a bone. tendon
Output Force divided by Input Force. actual mechanical advantage (AMA)
Input Distance divided by Output Distance. ideal mechanical advantage (IMA)
(Output work divided by Input work)times 100% efficiency
Force times Distance Work
The fulcrum is between the output force and the input force. First Class Lever
The fulcrum is at one end, the input force is applied at the other, and the output force is in between. Second Class Lever
The fulcrum is at one end, the output force is at the other, and the input force is in between. Third Class Lever
These levers always multiply force. They do not, however, change the direction of the input force. Examples include wheel barrows, doors, nutcrackers, and bottle openers. Second Class Lever
These levers multiply distance, but do not change the direction of the input force. Examples include lawn rakes, fishing poles, shovels, and baseball bats. Third Class Levers
If the distance from the fulcrum to the input force is greater than the distance from the fulcrum to the output force, these levers multiply force. Otherwise, they multiply distance. This kind of lever also changes the direction of the input force. First Class Levers
Created by: green8
Popular Physical Science sets

 

 



Voices

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:
Retries:
restart all cards