# A lab report for a high school physics class on the error of measurement.

Purpose:

The intention of this lab was to show how inaccurate and imprecise your measurements could be if you did not have the right measuring tools.

Procedure

1) Tennis Ball Diameter

A) circumference method

a) Take a piece of string and wrap it around the tennis ball in as straight of a path as possible

b) Place this string on a ruler and record measurement

c) The equation for diameter if a circle is

C=pi x d

B) average of two method

a) Take two tennis balls and place them side by side

b) Measure with a ruler the distance from one end of one tennis ball to the other end of the other tennis ball

c) Divide this distance by two to get the diameter of a tennis ball

C) Final averaging

a) Add up the diameters calculated from both the circumference and average method and divide by two to get the average diameter of a tennis ball

2) Diameter of a marble

A) Averaging method

a) Place four marbles side by side and measure the distance from end to end and divide by four to get the average of four marbles

b) Place three marbles side by side and measure the distance from end to end and divide by three to get the average of three marbles

c) Place two marbles side by side and measure the distance from end to end and divide by two to get the average of two marbles

d) measure one marble from side to side to get the diameter of one marble

e) Add up each of the calculated diameters and divide by four to get the average calculated diameter

3) Thickness of Copy Paper

A) Average method

a) count out 25 sheets of paper and measure the thickness using a ruler...