- Gather Data, find patterns, make a hypothesis, make a prediction, gather data again.
Testing new medicine - sugar pill - psychological impact - neither group knows if you're getting medication. *measure both groups
Person giving medication doesn't know what pill is which, so they don't act differently when administering the medication
In the gathering data step of the scientific method, both observations and experiments must be performed?
Law of Nature
A concise statement or mathematical equation about a fundamental relationship or regularity of nature.
A statement, made in advance, about what one believe will happen or how a particular system will behave - in the scientific method - the prediction is based on the hypothesis
The scientific method, which is very useful in many fields besides science, is simply...
A systematic way of evaluating evidence
Mechanics is concerned with:
The behavior of physical bodies when forces act on them. The effect of moving bodies on their environment.
regular and predictable, the universe is not random. It moves in regular, predictable ways.
Ptolemy - geocentric model of universe, copernicus - heliocentric model of universe, Kepler and Brahe - elliptical orbits
Galileo's experiments showed?
All objects fall at the same rate regardless of their mass and the velocity of a falling object that starts from rest is proportional to the length of time that it has been falling: v(m/s)=a(m/s2)xt(s)
Newtons 1st law of Motion:
every object continues in its state of rest, or in uniform motion, unless it is compelled to change that state by forces impressed upon it.
Newton's 2nd law of Motion:
The acceleration produced on a body by a force is proportional to the magnitude of the force and inversely proportional to the mass of the object