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//Question1
//Define Variables
var onem, onev, oner
//Assigns Random Integers
onem = (Math.floor(Math.random()*5)+1)*5;
onev = (Math.floor(Math.random()*4)+1)*5
oner = (Math.floor(Math.random()*10)+1)*0.1
//find kinetic energy
oneomega = onev/oner;
oneI = 0.5*onem*oner*oner;
oneTt = 0.5*onem*onev*onev;
oneTr = 0.5*oneI*oneomega*oneomega;
oneT = oneTt + oneTr;
oneT1 = 0.5*onem*onev + oneTr;
oneT2 = oneTt;
oneT3 = oneTr;
//Answer Choices
onecorrectanswer = oneT.toFixed(3).replace(/\.?0+$/,"").toString() + " J"
oneanswer1 = oneT1.toFixed(3).replace(/\.?0+$/,"").toString() + " J"
oneanswer2 = oneT2.toFixed(3).replace(/\.?0+$/,"").toString() + " J"
oneanswer3 = oneT3.toFixed(3).replace(/\.?0+$/,"").toString() + " J"
//Place Answer Choices into Array
oneanswerchoices = [oneanswer1, oneanswer2, oneanswer3, onecorrectanswer];
//Randomize Answer Choices
do {
var indexa = Math.floor(Math.random()*oneanswerchoices.length);
var indexb = Math.floor(Math.random()*oneanswerchoices.length);
}
while (indexb == indexa);
do {
var indexc = Math.floor(Math.random()*oneanswerchoices.length);
}
while (indexc == indexa || indexc == indexb);
do {
var indexd = Math.floor(Math.random()*oneanswerchoices.length);
}
while (indexd == indexa || indexd == indexb ||
indexd == indexc);
onea = oneanswerchoices[indexa];
oneb = oneanswerchoices[indexb];
onec = oneanswerchoices[indexc];
oned = oneanswerchoices[indexd];
if (indexa == 3) {
onecorrectchoice = "a"
}
if (indexb == 3) {
onecorrectchoice = "b"
}
if (indexc == 3) {
onecorrectchoice = "c"
}
if (indexd == 3) {
onecorrectchoice = "d"
}
//Qeustion 1 Question
question1 = "1. A " + onem.toString() + " kg disk is rolling along a flat surface at a rate of " + onev.toString() + " m/s. The disk has a radius of " + oner.toFixed(1).toString() + " m. Find the total kinetic energy of the disk."
//Question2
//Define Variables
var twok, twox
//Assigns Random Integers
twok = (Math.floor(Math.random()*5)+3)*100;
twox = (Math.floor(Math.random()*9)+1)*10;
//find potential energy
twoxm = twox/100;
twoU = 0.5*twok*twoxm*twoxm;
twoU1 = twok*twoxm*twoxm;
twoU2 = 0.5*twok*twoxm;
twoU3 = 100*twoxm*twoxm;
//Answer Choices
twocorrectanswer = twoU.toFixed(3).replace(/\.?0+$/,"").toString() + " J"
twoanswer1 = twoU1.toFixed(3).replace(/\.?0+$/,"").toString() + " J"
twoanswer2 = twoU2.toFixed(3).replace(/\.?0+$/,"").toString() + " J"
twoanswer3 = twoU3.toFixed(3).replace(/\.?0+$/,"").toString() + " J"
//Place Answer Choices into Array
twoanswerchoices = [twoanswer1, twoanswer2, twoanswer3, twocorrectanswer];
//Randomize Answer Choices
do {
var indexa = Math.floor(Math.random()*twoanswerchoices.length);
var indexb = Math.floor(Math.random()*twoanswerchoices.length);
}
while (indexb == indexa);
do {
var indexc = Math.floor(Math.random()*twoanswerchoices.length);
}
while (indexc == indexa || indexc == indexb);
do {
var indexd = Math.floor(Math.random()*twoanswerchoices.length);
}
while (indexd == indexa || indexd == indexb ||
indexd == indexc);
twoa = twoanswerchoices[indexa];
twob = twoanswerchoices[indexb];
twoc = twoanswerchoices[indexc];
twod = twoanswerchoices[indexd];
if (indexa == 3) {
twocorrectchoice = "a"
}
if (indexb == 3) {
twocorrectchoice = "b"
}
if (indexc == 3) {
twocorrectchoice = "c"
}
if (indexd == 3) {
twocorrectchoice = "d"
}
//Question 2 Question
question2 = "2. What is the potential energy of a spring that is extended " + twox.toString() + " cm and has a spring constant of k = " + twok.toString() + " N/m."
//Question3
//Define Variables
var threem, threeh
//Assigns Random Integers
threem = (Math.floor(Math.random()*5)+1)*5;
threeh = (Math.floor(Math.random()*5)+1)*50;
//find velocity
threeT2 = 0.5*threem;
threeU1 = threem*9.81*threeh;
threev = Math.sqrt(threeU1/threeT2);
threev1 = Math.sqrt(threeU1);
threev2 = Math.sqrt(threem*9.81*threeh/threem);
threev3 = Math.sqrt(9.81*threeh/0.5*threem)
//Answer Choices
threecorrectanswer = threev.toFixed(3).replace(/\.?0+$/,"").toString() + " m/s"
threeanswer1 = threev1.toFixed(3).replace(/\.?0+$/,"").toString() + " m/s"
threeanswer2 = threev2.toFixed(3).replace(/\.?0+$/,"").toString() + " m/s"
threeanswer3 = threev3.toFixed(3).replace(/\.?0+$/,"").toString() + " m/s"
//Place Answer Choices into Array
threeanswerchoices = [threeanswer1, threeanswer2, threeanswer3, threecorrectanswer];
//Randomize Answer Choices
do {
var indexa = Math.floor(Math.random()*twoanswerchoices.length);
var indexb = Math.floor(Math.random()*twoanswerchoices.length);
}
while (indexb == indexa);
do {
var indexc = Math.floor(Math.random()*twoanswerchoices.length);
}
while (indexc == indexa || indexc == indexb);
do {
var indexd = Math.floor(Math.random()*twoanswerchoices.length);
}
while (indexd == indexa || indexd == indexb ||
indexd == indexc);
threea = threeanswerchoices[indexa];
threeb = threeanswerchoices[indexb];
threec = threeanswerchoices[indexc];
threed = threeanswerchoices[indexd];
if (indexa == 3) {
threecorrectchoice = "a"
}
if (indexb == 3) {
threecorrectchoice = "b"
}
if (indexc == 3) {
threecorrectchoice = "c"
}
if (indexd == 3) {
threecorrectchoice = "d"
}
//Question 3 Question
question3 = "3. A " + threem.toString() + " kg weight is dropped from a height of " + threeh.toString() + " m. Neglecting air resistance, determine the velocity of the weight when it hits the ground."
//Question Slides
const myQuestions = [
{
question: question1,
answers: {
a: onea,
b: oneb,
c: onec,
d: oned
},
correctAnswer: onecorrectchoice
},
{
question: question2,
answers: {
a: twoa,
b: twob,
c: twoc,
d: twod
},
correctAnswer: twocorrectchoice
},
{
question: question3,
answers: {
a: threea,
b: threeb,
c: threec,
d: threed
},
correctAnswer: threecorrectchoice
}
];
function buildQuiz() {
// we'll need a place to store the HTML output
const output = [];
// for each question...
myQuestions.forEach((currentQuestion, questionNumber) => {
// we'll want to store the list of answer choices
const answers = [];
// and for each available answer...
for (letter in currentQuestion.answers) {
// ...add an HTML radio button
answers.push(
``
);
}
// add this question and its answers to the output
output.push(
`
${currentQuestion.question}
${answers.join("")}
`
);
});
// finally combine our output list into one string of HTML and put it on the page
quizContainer.innerHTML = output.join("");
}
function showResults() {
// gather answer containers from our quiz
const answerContainers = quizContainer.querySelectorAll(".answers");
// keep track of user's answers
let numCorrect = 0;
// for each question...
myQuestions.forEach((currentQuestion, questionNumber) => {
// find selected answer
const answerContainer = answerContainers[questionNumber];
const selector = `input[name=question${questionNumber}]:checked`;
const userAnswer = (answerContainer.querySelector(selector) || {}).value;
// if answer is correct
if (userAnswer === currentQuestion.correctAnswer) {
// add to the number of correct answers
numCorrect++;
// color the answers green
answerContainers[questionNumber].style.color = "green";
} else {
// if answer is wrong or blank
// color the answers red
answerContainers[questionNumber].style.color = "red";
}
});
// show number of correct answers out of total
resultsContainer.innerHTML = `${numCorrect} out of ${myQuestions.length}`;
}
function showSlide(n) {
slides[currentSlide].classList.remove("active-slide");
slides[n].classList.add("active-slide");
currentSlide = n;
if (currentSlide === 0) {
previousButton.style.display = "none";
} else {
previousButton.style.display = "inline-block";
}
if (currentSlide === slides.length - 1) {
nextButton.style.display = "none";
submitButton.style.display = "inline-block";
} else {
nextButton.style.display = "inline-block";
submitButton.style.display = "inline-block";
}
}
function showNextSlide() {
showSlide(currentSlide + 1);
}
function showPreviousSlide() {
showSlide(currentSlide - 1);
}
const quizContainer = document.getElementById("quiz");
const resultsContainer = document.getElementById("results");
const submitButton = document.getElementById("submit");
// display quiz right away
buildQuiz();
const previousButton = document.getElementById("previous");
const nextButton = document.getElementById("next");
const slides = document.querySelectorAll(".slide");
let currentSlide = 0;
showSlide(0);
// on submit, show results
submitButton.addEventListener("click", showResults);
previousButton.addEventListener("click", showPreviousSlide);
nextButton.addEventListener("click", showNextSlide);
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