p4 Flashcards
natural motion
gravity, smoke forces unseen
violent motion
imposed motion a result of push or pull forces seen
force
push or pull
friction
force that acts between materials that touch as they move past each other
inertia
an objects tendency to stay in motion if it is in motion and stay ar rest if in rest
volume
the measure of how much space an object takes up
mass
ammount of matter in an object
weight
measurement of the gravitational force acting on an object
net force
combination of all forces acting on an object
equilibrium
when net force equals zero
How did Aristotle describe motion? -
force causes motion; the two kinds are natural (unseen) and violent (seen)
What new idea did Copernicus have concerning the moving Earth? -
the Earth moves around the Sun
What is Newton’s 1st Law of motion? -
Every object continues in a state of rest or of motion in a straight line at a constant speed, unless it is compelled to change by forces exerted upon it
What is the net force working on an object with a 5 N force pulling it to the left and 2 N force also pulling it to the left?
7N left
What is the net force working on an object with a 5 N force pulling it to the left and 2 N force pulling it to the right?
3N left
