Module 1 - 4 Flashcards
This is often defined as a study of natural laws in the physical world, such as laws involving force, energy, and light.
Physics
This comprises units such as pound (for force), yard (for length), and ounce (for volume).
English and British system
This constitutes units based on powers of 10, which makes it the preferred system to be used in science.
metric system
The conference then created this, which is built upon a set of seven metric units.
SI (Systeme international d’unites or the Internation System of Units).
SI is built upon a set of seven metric units, which are called the?
base units
The technique of converting of one unit of measurement to another.
dimensional analysis
The starting point for dimensional analysis. This, or conversion factor is an equation that shows the equivalent amounts of different units.
unit equality
To express large and small numbers in a simpler way, they are usually written in _.
Scientific notation (also known as standard form)
These are the ones that the measuring instrument can give you,
certain or exact digits
The smallest marked division in the measuring instrument is called the
least count
These are the ones that you estimate.
uncertain digits
A reliable measurement will give the same results under the same conditions. The measurement is then precise, or it has high _.
precision
You can numerically describe the consistency (precision) of measurements using _. This measures how far or close the measurements are from the mean (average).
This is defined as the average of the squared difference of the measurements (x) from the mean (X).
Variance
The square root of the variance.
Standard deviation
If the set of measurements is close to the true or accepted value, it is said to have high _.
accuracy
A pictorial representation of the relationship between variales.
graph
The dependent variable is sometimes called the
responding or experimental value
The independent variable is also known as the
manipulated variable
This responds to the changes in the independent variable.
dependent variable
This is the one that you manipulate in the experiment.
independent variable
This can be used to make predictions using the data.
trend
A quantity that can only be described by its magnitude (numerical value consisting of the number and its unit), such as time, mass, and temperature.
scalar
A physical quantity characterized by both magnitude and direction is called a?
vector
This is also known as the head-to-tail method. This is easy to use if you want to add more than two vectors.
polygon method
A vector with a magnitude of 1 used to describe a direction in space. The symbol caret or “hat” (^) is placed above _ to distinguish it from ordinary vectors.
unit vector
The study of the motion.
Mechanics
Two general parts (fields) of mechanics:
kinematics and dynamics
The mathematical description of motion. You can describe motion using kinematic quantities such as position, speed, and acceleration.
Kinematics
The study of the causes of motion.
Dynamics
The fundamental concept in describing the motion of objects. It is the location of a body in space with reference to a fixed point.
Position
The length oof the path the body has taken. It is a scalar quantity - it is expressed in terms of magnitude and unit only.
The SI unit for distance is meter.
distance
This is the length of the straight line formed between the initial position and the final position of an object.
displacement
A vehicle’s speed at a particular moment. You can see this by looking at its speedometer.
instantaneous speed
The ratio of the total distance covered and the total amount of time traveled.
average speed
The concept where its speed is constant but its velocity is changing.
uniform circular motion
This means that their velocities change with respect to time at a constant rate. This shows _.
uniformly accelerated motion (UAM)
When an object falls under the influence of gravity alone, it is in a state of?
free fall
Galileo has proven that all objects, in the absence of air resistance, fall with the same constant acceleration. This acceleration is called _ and demoted by the symbol g.
acceleration due to gravity
