Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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


Introductory Concepts

“G” The “universal gravitational constant” = 6.67 X 10^-11 N-m^2/kg^2
Direction – horizontal Perpendicular to the direction gravity acts
Direction – vertical The line the direction of gravity acts
Newton’s Law of Gravity The description of the force acting between any two objects in the universe; Depends on the inverse of distance-squared
Projectile An object moving under the influence of gravity but in two dimensions (horizontally and vertically)
Projectile The horizontal and vertical motions are totally independent of each other
Projectile – Horizontal No force acts in horizontal direction; therefore the horizontal direction has constant velocity
Projectile – vertical The force acting in the vertical is gravity; the acceleration is g = 9.8 m/sec^2 (usually taken as 10 m/sec^2 in problems)
Satellite An object moving around a planet, like earth satellites and the moon
Satellite – behavior Is free-falling; due to “horizontal” or “tangential” velocity, it “falls around” the planet; constant energy
Speed - escape the speed necessary for an object to possess in order to completely leave the planet; 11.2 km/sec for earth
Speed – orbital the tangential speed necessary for an object to become a satellite just above the atmosphere of a planet; 8 km/sec for earth
Support force The force necessary to exactly oppose the gravitational force on an object resulting in equilibrium
Weight The support force opposing the attractive force of the earth on an object due to gravity
Weightless No support force; results in free-fall
Created by: brownglarry
Popular Physics sets




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:
restart all cards