Ch. 11 Sect. 2 Notes

StudyBlue printing of Ch. 11 Sect. 2 Notes html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, font, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; background: transparent; } body { line-height: 1; } blockquote, q { quotes: none; } blockquote:before, blockquote:after, q:before, q:after { content: ''; content: none; } /* remember to define focus styles! */ :focus { outline: 0; } /* remember to highlight inserts somehow! */ ins { text-decoration: none; } del { text-decoration: line-through; } /* tables still need 'cellspacing="0"' in the markup */ table { border-collapse: collapse; border-spacing: 0; } /* end RESET */ .header { min-width:800px; } .logo { padding:6px 20px 2px 20px; margin:0; font-size:25px; font-weight:bold; color:#808285; position:relative; border-bottom: 1px solid #c5c5c5; } .logo-blue { color:#70adc4; } .logo-desc { font-weight:normal; font-size:19px; color:#cccccc; margin-top:50px; position:absolute; display: none; } .back-button { position:absolute; top:20px; right:20px; font-size:13px; line-height:25px; color:rgb(0,175,225); font-weight:normal; } .back-button a { color:rgb(0,175,225); } .instructions { padding:0; margin:0; width:100%; position:relative; color:rgb(100,100,100); } .step-holder { border-left:1px solid #ededed; margin-left:20px; } .steps { padding:15px 0; float:left; width:24%; border-right:1px solid #ededed; text-align:center; } .steps-01 { } .steps-02 { } .steps-03 { } .steps-04 { } .label { padding:5px 10px; } .print-button { } .print-button a { background-color:rgb(0,175,225); color:white; line-height: 19px; padding:9px 8px 5px 30px; font-size:14px; text-decoration:none; background-image: url(images/printer.png); background-repeat: no-repeat; background-position: 7px 50%; -moz-border-radius: 5px; -webkit-border-radius: 5px; } .print-button a:hover { background-color:black; } .theNote .content { width: 8.0in !important; margin: 5px auto; padding:20px; background-color:white; } .theNote .header { border-bottom: 1px dashed #C8C8C8; font-size: 17px; padding: 0 0 10px; line-height: 19px; color: #00ADE1; min-width:500px; } .theNote .body { font-size: 14px; line-height: 19px; padding: 10px 0; } .theNote{ padding:6px 0; clear:both; background-color: rgb(200,200,200); } .theNote h3{ color: rgb(100,100,100); } .theNote h1, .theNote h3{ background-color:white; padding:2px 20px; width:8.0in !important; margin: 0 auto; font-size: 15px; } .theNote h1{ padding-top: 10px; font-size: 15px; } .theNote h1:first-child{ font-size: 20px; } .theNote h3 { font-size: 14px; font-weight: normal; } #options { border: 3px double #ccc; padding: 5px 12px; margin: 10px 50px 10px 20px; float: left; } #info { border-top: 1px solid #ccc; padding-top: 5px; font-style: italic; } li { margin: 5px 10px 5px 25px; } ul li { list-style: disc; } ol li { list-style: decimal; } img { border: 0; } table { clear: both; width: 100%; border: 1px solid #c5c5c5; border-width: 1px 0; margin: 0; page-break-after: always; } table#page { page-break-after: auto; } td { text-align: center; font-size: 12px; border-bottom: 1px dashed #c5c5c5; height: 1.75in; width: 50%; padding-left: 15px; } .leftside { border-right: 1px solid #cccccc; padding: 0 15px 0 0; } .bottom td { border-bottom: none; } .clearfix { clear:both; line-height:1px; height:1px; } img { max-width:80%; max-height:150px; margin:20px; } @media print {.header { display: none; } .content .header{ display:inherit; } table { border: 1px dashed #bbb; border-width: 1px 0; } .theNote{ background-color:white; } } Ch. 11 Sect. 2 Law of Universal Gravitation Universal Gravitation Equation : F=G m1(m2) / distance squared Isaac Newton - British Scientist, Discovered that all objects in the universe attract each other through gravitational force Law of Universal Gravitation - "All objects in the universe attract each other through gravitational force. 2. All matter is affected by gravity Every object exerts a gravitational force 3. Gravitational Force increases as mass increases Gravitational force between objects around smaller shapes is small 4. Gravitational force decreases as distance increases Gravitational force is dependant on distance between two objects Gravitational force is weaker than other forces 5. Freefall and Weight Freefall - motion of a body when only the force of gravity is acting on the body On earth, gravity= 9.8 m/s squared 6. FreeFall acceleration near Earth's surface is constant If there is no air resistance, all objects on earth accelerate at the same rate. Doesn't matter how much mass. Heavier object= greater gravitational force, harder to accelerate, because extra mass compensates for additional gravitational force. 7. Weight is equal to mass times free-fall acceleration Weight- Force on an object dud to gravity W=mass(free-fall acceleration) or w=mg Apparent Weightlessness - always in freefall 8. Weight is different from mass Mass - measure of the amount of matter in an object Weight - gravitational force an object experiences because of its mass 9. Weight influences shape Gravitational force influences shapes of living things Ex. Skeletons evolved to confront gravity 10. Velocity is constant when air resistance balances weight Terminal velocity - the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity Air and gravity act on objects moving through Earth's atmosphere 11. Free Fall and Motion An object is in free fall only if gravity is pulling it down and no oother forces are acting on it Objects in space are in freefall because of zero air resistance 12. Orbiting objects are in free fall 13. Two motions combine to cause orbiting Object is orbiting when it is traveling in a circular or nearly circular path around another object. T wo motions to make orbiting: Freefall motion forward motion 14. Projectile Motion and Gravity Projectile Motion - Curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth; the motion of objects that are moving in two dimensions under the influence of gravity. Two components of projectile motion: Horizontal and Vertical Components are independant Form a curved path 15. Projectile motion has some horizontal motion Horizontal motion - motion that is perpendicular to Earth's gravitational field 16. Projectile motion also has some vertical motion Vertical motion- motion in the direction in which the force of Earth's gravity act