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



motion the state in which one object's distance from another is changing
reference point a place or object used for comparison to determine if an object is in motion
relative motion whether or not a n object is in motion depends on the reference point you choose
meter the basic SI unit of length (a little longer than a yard)
speed the distance an object travels per unit of time
average speed the overall rate of speed at which an object moves calculated by dividing the total distance by the total time
formula for speed speed = distance/time
force a push or a pull exerted on an object
newton the SI unit for force
net force the overall force on an object when all of the individual forces acting on it are added together
centripetal force a force that causes an object to move in a circle
balanced forces equal forces acting on an object in opposite directions
unbalanced forces forces that produce a nonzero net force which causes an object's motion
friction the force that one surface exerts on another when the two surfaces rub against each other
sliding friction friction that occurs when one solid surface slides over another
rolling friction friction that occurs wen an object rolls over a surface
static friction friction that acts on objects that are not moving
fluid friction friction that occurs as an object moves through a fluid
mass the amount of matter in an object
weight the force of gravity on an object
gravity the force that pulls objects toward each other
Law of Universal Gravitation Gravity increases with mass and decreases with distance
Created by: sbraniecki