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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