the force that opposes motion between two surfaces that are touching
when the only force acting on an object is gravity; all objects near Earth fall at the SAME SPEED (regardless of how heavy/massive they are!!!)
equal and opposite forces
whenever a force is exerted, there is another force that is equal in size and opposite in direction
objects in motion tend to stay in the same motion; objects at rest tend to stay at rest
an object at rest has ______ momentum
SI Unit for force
Gravity depends upon...
the masses of the two objects and the distance between them (more mass means more gravity, more distance means less gravity)
Weight on planets
Planet has more mass = planet has more gravity = things weigh more
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.