HTML + CSS + JAVASCRIPT

CSS

div#principal {
width:90%;
}

section#cinematica h2 {
font-family: TimesNewRoman, "Times New Roman", Times, Baskerville, Georgia, serif;
text-shadow: #C0C0C0 1px 1px 1px, #ccc -1px -1px 1px;
font-weight: bold;
text-align: left;
}

section#cinematica {
margin: 0 auto;
width: 90%;
border-bottom: 1px solid #808080;
border-left: 1px solid #808080;
padding: 5px;
}

section#cinematica ul li {
font-size:25px;
font-family: TimesNewRoman, "Times New Roman", Times, Baskerville, Georgia, serif;
text-shadow: #C0C0C0 1px 1px 1px, #ccc -1px -1px 1px;
margin:5px;
text-align: left;
padding-top:10px;
clear:both;
}

div.tabela {
margin-top: 10px;
height:100%;
}

div#movimentoUniformementeVariado {
margin:0 auto;
width:90%;
height:330px;
box-shadow: 10px 10px 10px 5px black;
margin-bottom:20px;
padding:5px;
}

span#aceleracao {
font-weight:bold;
text-align:center;
}

span#span-01 {
float:left;
width:45%;
text-shadow:none;
margin:10px;
text-align:left;
padding:10px;
font-size:20px;
}

span#span-08 {
height:100%;
float:left;
width:45%;
text-shadow:none;
margin:10px;
text-align:left;
padding:10px;
font-size:18px;
}

span#span-09 {
float:left;
width:45%;
height:100%;
margin:10px;
padding:10px;
background-image: url("imagens/vel-x-tempo.GIF");
background-repeat: no-repeat;
background-position: center top;
}

h3.par-03 {
font-size:22px;
margin:10px;
text-align:center;
}

p#paragrafo {
text-align:left;
font-size:20px;
text-shadow:none;
font-style:italic;
}

p#p-css {
text-align:left;
color:blue;
font-size:12px;
}

p#p-css span {
color:red;
}

CSS - Responsivo

@media screen and (max-width: 1200px) {

h3 {
font-size:20px;
}

p#paragrafo {
font-size:18px;
}

span#span-01 {
font-size:17px;
}
}

@media screen and (max-width: 1000px) {

h3 {
font-size:18px;
}

span#span-01 {
font-size:16px;
}

h3.par-03 {
font-size:18px;
}
}

@media screen and (max-width: 900px) {

h3 {
font-size:16px;
}

span#span-01 {
font-size:15px;
}
}

@media screen and (max-width: 800px) {

p#p-css {
font-size:11px;
}

h3 {
font-size:15px;
}

div#movimentoUniformementeVariado span#span-01 {
border:2px solid #000;
width:80%;
margin-left:10%;
}

div#movimentoUniformementeVariado span#span-08 {
clear:both;
width:80%;
margin-left:10%;
height:250px;
}
}

@media screen and (max-width: 700px) {

p#p-css {
font-size:10px;
}

div#movimentoUniformementeVariado span#span-01 {
width:90%;
margin-left:5%;
}

div#movimentoUniformementeVariado span#span-08 {
width:90%;
margin-left:5%;
}
}

@media screen and (max-width: 600px) {

div#movimentoUniformementeVariado span#span-01 {
width:95%;
margin-left:2%;
}

div#movimentoUniformementeVariado span#span-08 {
width:95%;
margin-left:2%;
}
}

JAVASCRIPT