Physics equations/07-Work and Energy/Q:cart1/history

This quiz is different because it also runs on GNU Octave
This quiz was one of the first wikiquizzes, created so inartfully using Excel that it was impossible to add to the initial three versions that were used at the time.

The reader may note that this quiz uses scientific notation in exponential form using three digits E001 instead of MatLabs customary E01. This testbank was the first to created by GNU Octave (months after a quiz-making program was written for MatLab). Octave is the open source alternative to MatLab that is more difficult to use because its GUI is not user-friendly. For that reason, as of November 2014, there are no immediate plans to use Octave to develop more wikiquizzes. However at some point, it would be nice if open source tests were written using open source software. (Also, it might be better to use another open source language such as Python or Ruby).

To run this code in Octave, put these two files into one folder and run main.m. For more information visit MATLAB/Octave and MATLAB/Wikiquiz_writer_(MATLAB).

testeditor.m
function [ wikiName, wikiHeadABC, wikiHeadD_Z,wikiFirst, wikiCell, wikiMatrix, wikiType] = testeditor %NO EDIT %% Change the following lines as needed: wikiName='pe07-Cart1'; %Name of wikiquiz wikiHeadABC='/testbank/  ' ; %What follows is long, so we concatenate: wikiHeadABC=[wikiHeadABC '; wikiHeadABC=[wikiHeadABC '/openstaxphysics/quiz_solutions/quiz_solutions.htm']; wikiHeadABC=[wikiHeadABC ' Solutions to many wikiquiz questions (pdf)]'] ; wikiHeadD_Z='Testbank';%''; wikiFirst='noIntroLine';% (If 'noIntroLine' there is no introductory line) wikiType =1;%Set wikiType to 1 or 2 %  If WikiType=1, wrong answers are %      multiplied by 10^(n/N) where n is a small integer and N=wikiDR %  If WikiType=2, wrong answers are %      larger by n*N where n is a small integer and N=wikiDR %              wikiQI=0; %NO EDIT  (counts the questions) % % Copy and paste from %%BEGIN QUESTION%% to %%END QUESTION%% as needed %% BEGIN QUESTION 1%% wikiS='If the initial velocity after leaving the spring is '; % S0 DONE wikiV=randi([21,99])/10; v=wikiV ; % V1 DONE (inserted earlier to test: wikiV=5;) wikiS= [wikiS num2str(wikiV)]; %V2 DONE wikiS=[wikiS,' m/s, how high does it reach before coming to rest?']; % S1 DONE wikiS=; % S1 DONE answer=v^2/2/9.8; wikiA =answer; wikiU =' m'; wikiDR = 12; wikiSigfig=2; wikiQI=wikiQI+1;wikiCell{wikiQI,1}=wikiS;wikiCell{wikiQI,2}=wikiU; wikiMatrix(wikiQI,:)=[wikiA wikiDR wikiSigfig]; %% BEGIN QUESTION 2%% wikiS='The mass of the cart is '; % S0 DONE wikiV=randi([21,99])/10; m=wikiV ; % V1 DONE (Inserted earlier to test: wikiV= 2; wikiS= [wikiS num2str(wikiV)]; % V2  DONE wikiS=[wikiS,'kg, and the spring constant is ']; % S1 DONE wikiV=randi([4001,9999]);  k=wikiV; % V1  DONE  (Inserted earlier to test: wikiV=5447; wikiS= [wikiS num2str(wikiV)]; % V2 DONE  (Inserted earlier to test: wikiS=[wikiS 'N/m. If the initial compression of the spring is ']; % S1 DONE wikiV=randi([1,7])/10;  L=wikiV; % V1    DONE (Inserted earlier to test: wikiV=0.1; wikiS= [wikiS num2str(wikiV)]; % V2 DONE wikiS=[wikiS 'm, how high does it reach before coming to rest? ' ]; % S1 DONE wikiS=; % S1 DONE answer=k*L^2/2/m/9.8; % use as many lines as you need to obtain wikiA: wikiA =answer; % wikiA = answer (reserved) wikiU =' m';% wikiU = units (reserved) wikiDR = 12; % wikiDR = detractor ratio is wikType=1 (reserved) DONE wikiSigfig=2;% wikiSigfig = sig figs (reserved) %Housekeeping (do not edit) wikiQI=wikiQI+1;wikiCell{wikiQI,1}=wikiS;wikiCell{wikiQI,2}=wikiU; %Do not edit wikiMatrix(wikiQI,:)=[wikiA wikiDR wikiSigfig]; %Do not edit D %%% BEGIN QUESTION 3%% wikiS='What is the highest point the cart reaches if the speed was '; % S0 wikiV=randi([65,85])/10; v1=wikiV ; % V1 DONE  (Inserted earlier to test: wikiV=.14; wikiS= [wikiS num2str(wikiV)]; % V2 wikiS=[wikiS,'m/s when the cart was situated at a height of ']; % S1 wikiV=randi([11,31])/10;  h1=wikiV; % V1  DONE  (Inserted earlier to test:  wikiV=2.2; wikiS= [wikiS num2str(wikiV)]; % V2 wikiS=[wikiS 'm? ']; % S1 wikiS=; % S1 DONE answer=h1+v1^2/2/9.8; % use as many lines as you need to obtain wikiA: %h1overSum=h1/answer wikiA =answer; % wikiA = answer (reserved) wikiU =' m';% wikiU = units (reserved) wikiDR = 14; % wikiDR = detractor ratio is wikType=1 (reserved) wikiSigfig=2;% wikiSigfig = sig figs (reserved) %Housekeeping (do not edit) wikiQI=wikiQI+1;wikiCell{wikiQI,1}=wikiS;wikiCell{wikiQI,2}=wikiU; %Do not edit wikiMatrix(wikiQI,:)=[wikiA wikiDR wikiSigfig]; %Do not edit % end % NO EDIT (must follow last question)

main.m
function [void]=main(void) %NO EDIT %MAIN is the program you run to create the wikiquizzes after %numericWiki.m has been suitably modified. But you do not edit MAIN. % variable list (may be outdated) %NO EDIT % wikiMatrix(answer,wikiDR,wikiSigFig) %NO EDIT % wikiType = 1 most of the time.%NO EDIT % WikiSigFig is called sf in bookeeping.%NO EDIT % [ wikiName, wikiHeadABC,wikiHeadD_Z, wikiFirst, wikiCell, wikiMatrix, wikiType] = testeditor;%NO EDIT cellsofar{1,1}=wikiHeadABC;%%NO EDIT First line of a wikiquiz for index=65:67%NO EDIT [ wikiName, wikiHeadABC,wikiHeadD_Z, wikiFirst, wikiCell, wikiMatrix, wikiType] = testeditor;%NO EDIT cellsofar=startonequiz(wikiName,char(index), wikiFirst, cellsofar);% ... cellsofar=finishthequiz(wikiMatrix,wikiCell,1, cellsofar);% ... printafile([wikiName 'ABC'],cellsofar);%NO EDIT end%NO EDIT clear cellsofar;%NO EDIT cellsofar{1,1}=wikiHeadD_Z;%First line of a wikiquiz %NO EDIT for index=68:90%NO EDIT [ wikiName, wikiHeadABC,wikiHeadD_Z, wikiFirst, wikiCell, wikiMatrix, wikiType] = testeditor;%NO EDIT cellsofar=startonequiz(wikiName,char(index), wikiFirst, cellsofar);% ... cellsofar=finishthequiz(wikiMatrix,wikiCell,1, cellsofar);% ... printafile([wikiName 'D_Z'],cellsofar);%NO EDIT end%NO EDIT %NO EDIT %%% functions %%%%%NO EDIT function [cellsofar]=finishthequiz(wikiMatrix,wikiCell,wikiType, cellsofar)%NO EDIT % FINISHTHEQUIZ finishes a wikiquiz with nQues=size(wikiMatrix,1);%NO EDIT for iQues=1:nQues%NO EDIT cellsofar{size(cellsofar,1)+1,1}=['{',char(wikiCell(iQues,1)),'}'];%NO EDIT anspos = randi([1,5]);%NO EDIT for iAns=1:5%NO EDIT lett=char(96+iAns);%NO EDIT if iAns==anspos%NO EDIT key = '+';%NO EDIT else%NO EDIT key = '-';%NO EDIT end%NO EDIT s=[key,lett,') '];%NO EDIT               %%%%%%%%The default is wikiType =1%%%%%%%%%NO EDIT %This default multiplies the answer by 10^(n/N) where N=wikiDR=wikiMatrix(:,2)                                 if wikiType ==1%NO EDIT                ef=10^((iAns-anspos)/wikiMatrix(iQues,2));%NO EDIT                sf=num2str(wikiMatrix(iQues,3)); % = wikiSigFig in testeditor                form=['%.' sf 'E'];%NO EDIT                num = num2str(ef*wikiMatrix(iQues,1),form);%NO EDIT                end%NO EDIT                %%%%%%%%%%%%%% wikiType not yet incorporated%%%%%%%%              if wikiType==2%NO EDIT                ef=iAns-anspos; %ef is now what is added or subtracted                 sf=num2str(WikiMatrix(iQues,3));%NO EDIT                form=['%6.' sf 'f'];  % now floating point                num = num2str(ef+WikiMatrix(iQues,1),form);%NO EDIT              end %NO EDIT %end copy to below %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%               s=[s num ' ' char(wikiCell(iQues,2))];%NO EDIT cellsofar{size(cellsofar,1)+1,1}=s;%NO EDIT end%NO EDIT cellsofar{size(cellsofar,1)+1,1}= ' ' ;%NO EDIT end%NO EDIT cellsofar{size(cellsofar,1)+1,1}= ' ' ;%NO EDIT end%NO EDIT end%NO EDIT %NO EDIT function [cellsofar]=startonequiz(wikiName, letter ,wikiFirst,cellsofar)%NO EDIT %STARTONEQUIZ adds: ==wikiName letter==   wikifirst   <quiz... % cellsofar is appended to original cellsofar string = ['==' wikiName ' ' letter '=='];%NO EDIT cellsofar{size(cellsofar,1)+1,1}=string;%NO EDIT if ~strcmp(wikiFirst,'noIntroLine');%NO EDIT cellsofar{size(cellsofar,1)+1,1}=wikiFirst;%NO EDIT end%NO EDIT cellsofar{size(cellsofar,1)+1,1}= ' ';%NO EDIT end%NO EDIT function []=printafile(filename,cellsofar)%NO EDIT %PRINTAFILE makes a txt file with the name filename that contains the cell array cellsofar fout=fopen([filename '.txt'], 'w+');%NO EDIT for count=1:size(cellsofar,1)%NO EDIT string=char(cellsofar(count,1));%NO EDIT fprintf(fout,'%s\n',char(string));%NO EDIT end%NO EDIT fclose(fout);%NO EDIT end%NO EDIT