{"id":1698,"date":"2023-10-01T13:43:57","date_gmt":"2023-10-01T13:43:57","guid":{"rendered":"http:\/\/localhost\/ecole9ja\/?p=1698"},"modified":"2023-10-01T13:45:55","modified_gmt":"2023-10-01T13:45:55","slug":"week-5-jss-3-third-term-basic-science-notes","status":"publish","type":"post","link":"https:\/\/ecolebooks.com\/nigeria\/posts\/week-5-jss-3-third-term-basic-science-notes\/","title":{"rendered":"Week 5 &#8211; Jss 3 Third Term Basic Science Notes"},"content":{"rendered":"<p><strong>WEEK5-Simple Machine<br \/>\n<\/strong>A machine  is defined as any arrangement that enables work to be done easily.<br \/>\nTypes of machine<br \/>\nThere are different types of simple machines ;  lever, pulley,  wheel and axle,  inclined plane,  screw and jack  and hydraulic press .A machine is made of three important parts namely; pivot or fulcrum, effort and load.<br \/>\nThe <strong>effort<\/strong> is a part of the machine where force is applied on the machine.<br \/>\nThe <strong>pivot <\/strong>or fulcrum is the turning point of a machine or it is the joining part or link between the effort and the load.<br \/>\n<strong>Load<\/strong> is the force, weight or resistance to be overcome by a machine<br \/>\n<strong>LEVERS  <\/strong>are simple machines that have unique arrangement of the three important parts that is  effort, load and pivot There are three classes of levers ; first class lever, second class lever and third class lever .The arrangement of the three important parts can be used to recognize which type of lever.<br \/>\n1. First class lever, the pivot is between the load and the effort. Examples are scissors, plier ,see-saw ,claw hammer .<br \/>\n2. Second class lever, the load is between the effort and pivot. Examples are wheel barrow, nutcrackers,  nail, clippers, bottle openers.<br \/>\n3.Third class lever are those levers which have their effort between the pivot and the load. Examples  are  human forearm, laboratory tong and fishing rod.<br \/>\nINCLINED PLANE-is a simple machine used to objects to a higher or tower place. It  is heavier to push  a heavy object up a slope to a greater height than to lift the object up to the height.<br \/>\nPULLEYS- is a simple machine that changes the direction or amount of force. It is  a wheel with  a groove along its rim, and   a movable rope around its wheel.<br \/>\nA WEGDE- is a simple machine that works on the principles of an inclined plane. Wedges are used for cutting and piercing. Examples are knives, pin blades or axes.<br \/>\nEFFICIENCY-The efficiency of a machine is expressed as the ratio of energy output to the energy input. The efficiency is always expressed in percentage, therefore<br \/>\nEFFICIENCY=    energy output     100<br \/>\n                           Energy input<br \/>\nMaintenance of machine.<br \/>\n1.By oiling , greasing  use of ball bearing to reduce friction.<br \/>\n2.By regular removal of dirt from the machine<br \/>\n3.Checking of engine oil regularly.<br \/>\n4.Checking all machine to detect any fault.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>WEEK5-Simple Machine A machine is defined as any arrangement that enables work to be done&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,158],"tags":[],"class_list":["post-1698","post","type-post","status-publish","format-standard","hentry","category-posts","category-third-term-jss3-basic-science"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/1698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/comments?post=1698"}],"version-history":[{"count":1,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/1698\/revisions"}],"predecessor-version":[{"id":1699,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/1698\/revisions\/1699"}],"wp:attachment":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/media?parent=1698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/categories?post=1698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/tags?post=1698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}