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15 Cards in this Set

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  • Back
Define distance.
A measure of space in one dimension. meter, millimeter, kilometer, centimeter or foot inch mile
Define time.
Based on periodic phenomena--processes that repeat over and over at a regular rate. seconds, minute, hours as far as 9 places.
Define mass.
A measure of how much matter is contained in it. kilogram, gram
What are the three fundamental physical qantities used in mechanics, the branch of physics dealing with the motion of objects.
distance time and mass
Define speed.
Rate of movement. Rate of change of distance from a reference point. The distance something travels divided by the time elapsed.(distance/time)
Define Velocity.
Speed in a particular direction. (speed + direction)
Define acceleration
Rate of change of velocity. (velocity/time)
Define vectors.
Vectors have both a numerical size and a direction associated with them.
Define centripetal acceleration.
The acceleration of an object moving in a circular path.
Explain what a "derived unit" of measure is.
length meter m
mass kilogram kg
time second s
What are the "basic" or "fundamental" physical quantities? Why are they called that?
Distance, time and mass.
List the physical quantities identified in this chapter. From which of the fundamental physical quantites is each derived? Which of them are vectors, and which are scalars?
Velocity, distance- vector
Speed - scalars
time mass volume - scalars
What is the distinction between speed and velocity? Describe a situation in which an object's speed is constant but its velocity is not.
speed is distance/time (straight line)
Velocity is speed + direction.
While driving on a winding road the movement of the compass needle indicates that the velocity is changing even if the speed is not.
What is "vector addition," and how is it done?
When you have two velocities. At the two velocities together.
What is the relationship between velocity and acceleration?
Acceleration indicates how rapidly velocity is changing, and velocity indicates how rapidly displacement is changing.