conceptual physics
Terms
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- Most basic science of all the sciences
- physics
- _______ supports chemistry, which in turn supports _______
- physics, biology
- When the findings in nature are expressed __________, they are easier to verify or to disprove by experiment
- mathematics
- A method that is extremeley effective in gaining, organizing, and applying new knowledge
- scientific method
- Steps of the scientific method
- 1. recognize a problem 2. make an educated guess-hypothesis 3. predict the cosequences of the hypothesis 4. perform experiments to test predictions 5. formulate the simplest general rule that organizes the hypothesis, prediction, and experimental outcome
- a close agreement by competent observers who make a series of observations of the same phenomenon
- fact
- an educated guess
- hypothesis
- hypotheses that have been tested over adn over again and have not been contradicted
- laws or principles
- a synthesis of a large body of information that encompasses well-tested and verified hypotheses about certain aspects of the natural world
- theory
- for a hypothesis to be scientific their must be a _____ to prove it wrong
- test or experiment
- Science and technology are _______ enterprises
- human
- a measure of how fast something is moving, or rate at which distance is covered
- speed
- The speed at an instant
- instantaneous speed
- total distance covered divided by time
- average speed
- speed in a given direction
- velocity
- The rate at which the velocity is changing
- acceleration
- Acceleration applies to changes in _______ as well as changes in speed
- direction
- falling objects only affected by gravity
- free falling
- a quantity that requires both magnitude and direction for a complete description
- vector quantity
- a quantity that is completely described by magnitude only
- scalar quantity
- an arrow
- a vector
- the diagonal of the rectangel described by the two vectors
- resultant
- pair of vectors
- components
- process of determining the components of a vector
- resolution
- an object with a curved path of motion consisting of a horizontal and vertical component
- projectile
- When no horizontal _______ acts on a projectile, the horizontal velocity remains constant
- force
- the veritical component of a projectile changes with time due to ________
- gravity
- the ________ component of motion for a projectile is completely independent of the vertical component of motion
- horizontal
- Galileo concluded that if it were not for ________ an object in motion would keep moving forever
- friction
- Copernicus was the first to think that the earth _______ around the sun
- revolved
- Every object continues in a state of rest, or of motion in a straight line at constant speed, unless it is compelled to change that state by ______ exerted upon it
- forces
- the quantity of matter in an object
- mass
- the force of gravity on an object
- weight
- ______ = mass x acceleration due to gravity
- weight, weight=mg
- combination of all forces acting on an object
- net force
- support force is often called _______ force
- normal
- net force of zero
- equilibrium
- The ______ the angle of support ropes or wire from the vertical, the larger the tension force in them
- greater
- _____ causes acceleration
- force
- ________ is directly proportional to net force
- ACCELERATION~net force
- ________ ~ 1/mass
- acceleration is inversely proportional to mass
- The ________ produced by a net force on an object is directly proportional to the magnitude of the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object
- acceleration
- ________~ net force/ mass
- acceleration a=F/m
- any push or pull
- force
- the name given to the force that acts between materials that touch as they move past each other
- friction
- liquids and gases
- fluids
- the friction acting on something moving through air
- air resistance
- the amount of force per unit of area
- pressure
- _______ = force/ area of application
- pressure
- 1 newton per square meter is equal to one _________
- pascal
- point at which the air resistance on an object equals the weight of the feather, the net force is zero and no further acceleration occurs
- terminal speed or terminal velocity for falling objects