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45 Cards in this Set

  • Front
  • Back

Physics

branch of science that involves the study of the physical world.

scientific method

patterns of logical approaches to a problem

hypothesis

testable explanation for a problem using what you know and have observed

control

is the standard by which the experimental results can be compared

independent variable

the factor that is not allowed to change

dependent variable

the factors whose outcome depends on the independent variable

model

a representation of an idea, event, structure, or an object that helps people better understand it

scientific theory

an explanation of things on events based on knowledge gained from many observations

scientific law

a statement about what happens in nature and seems to be true

SI

dometric system

dimensional analysis

method of treating the units as algebraic quantities that can be cancelled

significant figures

digits in a measurement

parallax

the difference in a parent direction of an object as seen from 2 different points on a straight line

measurement

is a comparison between an unknown quality and a standard.

precision

the degree of exactness of a measurement

accuracy

closeness of a measurement

motion diagram

series of images showing positions of moving object taken at regular time intervals

particle model

a simplified version of a motion diagram in which the moving object is replaced by a series of single points

dimension

measure in one direction

coordinate system

a system used to describe motion that gives the zero point location of the variable being studied.

origin

the point at which both variables in a coordinate system have the value zero

position

the distance and direction from the origin to an object

distance

the entire length of an objects path even if the object moves in many directions

magnitude

a measure of size

vector

quantity that has both magnitude and direction

scalar

quantity that is just a number without any direction

time interval

difference between 2 times

displacement

a change in position

resultant

a vector that represents the sum of 2 other vectors

intersection

place were 2 or more things meet or cross

position time graph

graph that can be used to determine an objects velocity and position

absolute value

non negative number equal in numerical value to a given real number

average velocity

ratio of the change of position to the time interval

average speed

distance traveled divided by the time taken to travel the distance

instantaneous velocity

a measure of motion that tells the speed and direction of an object at a specific instant

acceleration

is the change in velocity divided by the interval of time which the change occurs.

instaneous acceleration

change in an objects velocity at a specific instant

free fall

the motion of an object body when air resistance is negligible

free fall acceleration

the acceleration of an object due to the effect of gravity

deceleration

negative acceleration

mechanics

study of motion

uniform motion

motion where equal displacements occur during successful, equal time intervals

frame of reference

a set of criteria or stated values in relation to which measurements or judgements can be made

veloctiy time graph

a graph that has velocity plotted on the vertical axis

average acceleration

the change in an objects velocity during a measurable time interval divided by that specific time interval