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15 Cards in this Set

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Define:


Dimension
denotes a physical nature of a quantity
dimensional analysis
can be treated as algebraic quantities
significant figure
a reliable digit
order of magnitude
closest to the actual value of the quantity
Name the three basic dimensional quantities with their corresponding symbols are:
length L
mass M
Time T
Write the formula for the volume of a sphere. What are the dimensions of r,V,pie, 3
V=4/3pie*r^3
r=L
V=L^3
pie and 3 are dimensionless constants
Write the formula for the area of a triangle and dimensional formula for the area of a triangle
A=bh/2;
L^2
define:
average velocity
total distance traveled divided by total time
define instantaneous velocity
the limit of this ratio as the time interval is made smaller and smaller

v= change in displacement/change in time
Define acceleration
a measure of the rate at which the velocity is changing

a= change in velocity/change in time
What is a vector?
when the motion of a body is not confined to a straight line having both magnitude and direction
what is the sum or resultant of a vector
two or more vectors is represented by an arrow drawn from the tail of the first vector to the head of the last vector
The vector quantities that arise in the study of kinematics are:
displacement, velocity, acceleration
A sound wave travels a distance of 68 m in 1/5 s. Calculate the velocity of sound in m/s.
v1= distance/time
What are the most common SI units?
meter, kilogram, and seconds
length, mass, time