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15 Cards in this Set
 Front
 Back
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 