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

ch 4&5

Kinetic energy energy of a moving object has because of its motion 
joule SI unit of energy 
potential energy stored energy an object has due to its position
Elastic potential energy energy stored when an object is compressed or stretched 
chemical potential energy energy stored in chemical bonds 
gravitational potential energy energy stored by objects due to their position above Earth's surface 
Mechanical energy sum of the potential energy and kinetic energy in a system 
Law of conservation of energy states that energy can never be created or destroyed 
Work transfer of energy that occurs when a force makes an object move; measured in joules
Power amount of work done, or the amount of energy transferred, divided by the time required to do the work or transfer the energy; measured in watts 
Machine device that makes doing work easier by increasing the force applied to an object, changing the direction of an applied force, or increasing the distance over which a force can be applied
Input force the force that is applied to the machine 
Output force the force that is applied by the machine 
Mechanical advantage ratio of the output force exerted by a machine to the input force applied to the machine 
Efficiency ratio of the output work done by the machine to the input work done on the machine, expressed as a percentage 
Simple machine machine that does work with only one movement
Compound machine machine that is a combination of two or more simple machines 
Created by: adajahhoran