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


Friction Is a force that two surfaces exert on each other when they rub against each other
Static Friction The friction that acts on objects that are not moving
Sliding Friction Occurs when two solid surfaces slide over each other
Rolling Friction When an object rolls across a surface
Fluid Friction Occurs when a solid object moves through a fluid
Gravity Is a force that pulls objects toward each other
Mass The measure of the amount of matter in an object
Weight The gravitational force exerted on a person or object at the surface of a planet
Free Fall When the only force is acting on an object is gravity, the object is said to be in free fall
Air Resistance Acts on objects falling through air
Projectile An object that is thrown
Compression Is an elastic force that squeezes or pushes matter together
Tension An elastic force that stretches or pulls matter
Created by: Buttercup133