Simple Machines - Inclined Plane And Lever - video Dailymotion

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Transcript

00:00hi kids today we will learn about some structures that are known as simple

00:07machines so let's get started kids what is a machine a machine is any

00:16structure that makes our work easier our work takes lesser time and lesser energy

00:23if we use some machine for it example if your pencil is blunt and you want to

00:31sharpen it you will use a simple structure a sharpener it will make it

00:38easy to sharpen it so a sharpener is a kind of simple machine that helps you

00:45out in doing something now let's first see what is the difference between a

00:52simple machine and a complex machine simple machines are those structures

01:00that have a few or no moving parts while complex machines are made up of two or

01:08more simple machines working together as a single machine let's have some

01:16examples if you are on floor 1 and you have to go to floor 10 if you use the

01:24stairs that is you do not use any machine it will take a lot of time on

01:31the other hand if you use a machine example an elevator you can reach in a

01:39few seconds so an elevator is a very complex machine which is made up of so

01:47many simple machines working together now let's take an example of simple

01:57machines screw it is a simple machine that lets you join two things so kids

02:07let's learn about a few basic structures that are quite simple machines inclined

02:14plane a ramp of any form is a simplest machine and it makes moving up or down

02:23any object easier so you can slide down the ramp any heavy object or slide up

02:31the ramp any heavy object so a ramp or an inclined plane makes your work easier

02:40let's see more examples of inclined plane a slide is an example of inclined

02:49plane where you enjoy coming down with ease ramp way in your school is an

02:57example of inclined plane a ramp is easier to use than the stairs now let's

03:06learn another simple machine it is a lever a lever is another simple machine

03:13that makes work easier let's see what is a lever and how it makes our work easier

03:22a lever is basically a long stick that you push or pull against a fulcrum to

03:31move something in order to lift an object by hand requires force example to

03:39lift this heavy weight by hand or using your muscular force you require a lot of

03:45muscular strength but we can lift this object without applying much muscular

03:51force using a lever now let's see what is this lever a lever is nothing but a

04:00rigid bar that moves around a support and that support is known as fulcrum of

04:06the lever object to be moved or lifted up is placed on one side of the rigid

04:13bar and force is applied on the other side of the bar to lift it this way

04:21object can be lifted with much ease compared to lifting the object using

04:28muscular force let's see a few things that use the concept of a lever for

04:34their working scissors hammer claws pliers nutcrackers tongs all these

04:46things are based on the principle of a lever so kids today we learn what is a

04:53simple machine and a few types of simple machines now you may go ahead and take a

04:59quiz to learn more bye-bye