Physics Final Review (Semester 1) Flashcards
Scalar
Magnitude and no direction
Vector
Magnitude and direction
Precision
The frequency of something producing the same thing in close proximity
Accuracy
How close it is to actual value
Particle model
Where the object moves in a single point(simplified motion diagram)
Magnitude
Size
Displacement
A change in position having both magnitude and direction
Vectors
The sum of two or more vectors being added
Acceleration
The change in velocity over time
Free fall
Motion of an object when gravity is the only significant force
Acceleration due to gravity
Acceleration of an object only due to the force of gravity
Force
A push or a pull
Inertia
The tendency to resist change
Newton’s First Law
An object will remain at rest (or moving constantly) unless acted on by an external force
Newton’s Second Law
New force is equal to mass times acceleration F=ma
Newton’s Third Law
For every action there’s an equal and opposite reaction
Uniform motion
Type of motion in which an object travels in a straight line with a uniform speed
Contact force
A force as a result of two objects in contact
Field Force
A force exerted on a n object that has no contact
Drag force
A force acting in opposite to the relative motion of an object moving
Terminal Velocity
Maximum velocity attainable by an object as it falls
Normal force
The force the surface exerts; so objects don’t pass through each other
Kepler’s First Law
Each planet’s orbit about the sun is an ellipse
Kepler’s Second Law
An imaginary line between the sun and planet sweeps out equal areas in equal time
Kepler’s Third Law
Square periods are proportional to the cubes of their radius (can find distance/period)
Newton’s Law of Universal Gravitation
Suggests that objects attracts other objects without force that’s proportional to product of masses and inversely proportional to the square radius.
Scientific Theory
An explanation of things/events based on on knowledge gained through observations and investigations
Scientific Law
A description of a rule of nature
Which prefix denotes the smallest amount
Nano/pico
A hypothesis can best be defined as a
prediciton
Velocity
Distance over time, how fast it’s moving and in which direction it’s moving
The rate at which an object’s velocity changes
Acceleration
Velocity equation
d/t
A force exerted without contact
Field force
Every action has an equal but opposite reaction
Newton’s Third Law
Two forces that are in opposite directions but have equal magnitudes a
Interaction pair
In metric system, what is the base unity for length
Meters
A device with a very small divisions on its scale can measure with high
precision
What is the base unit for mass
kilograms
Which prefix denotes the largest amount
Milli
What should a scientist do if his conclusion does not match his original hypothesis
Revise the original hypothesis
A series of points that depict an object in motion
Particle model