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

Unit 4 Vocabulary

distance length between two places
position object’s location compared to other things
motion change in an object’s position compared to a fixed object
speed how fast an object’s position changes with time at any given moment (speed= distance ÷ time)
velocity description of a moving object’s speed and direction
acceleration measure of the change in velocity during a period of time (acceleration = change in speed ÷ time)
force any push or pull on an object
contact force- force applied when two objects touch
noncontact force a force that one object can apply without touching
net force combination of all the forces acting on an object
balanced force forces acting on an object that combine to form a net force of zero
unbalanced force forces acting on an object that combine to form a net force that is not zero
gravity attractive force that exists between all objects that have mass
friction force that opposes the motion of an object
air resistance fluid friction between the surface of an object and the air
elastic force force exerted by a material when it is stretched or compressed
tension force pulling force applied when an object is stretched
Newton’s 1st law of motion an object at rest tends to stay at rest and an object in constant motion tends to stay in motion unless acted upon by an unbalanced force.
Newton’s 2nd law of motion acceleration depends on the object’s mass and the amount of net force applied to it
Newton’s 3rd law of motion when one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object (action, reaction forces)
Action force push of the first object on the second
Reaction force push of the second object back on the first
Created by: lindsaystagg123