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प्रश्न
Read the conversation of the simple machines. Take roles to play. Then discuss in pairs to describe any simple machine. Create your own storyboard and take roles to play.
Jack: Don't you know how simple machines make your life easy?
Jimmy: Um... I don't know what simple machines are.
Jack: Simple machines are mechanical devices for applying force like a wedge or ramp.
Jimmy: Oh! wow! How I did not know this!
Jack: Like the wheels on hospital bed and IV pole. They help you move people faster by reducing the friction.
Jimmy: Is the stick over there that the TV is attached to, is that a simple machine too?
Jack: Yes it is, it's a lever. The wheels on the bus are simple machines, they make the bus move.
Jimmy: What about the doors?
Jack: 'Yeah' the driver pulls a lever and the doors open and you climb up the inclined plane aka the stairs. The cable in the elevator is wrapped around a groove in the wheel and axle, an electric motor pulls the cable, lifting the car between floors.
Jimmy: So the wheels on the rolling chair are too by rolling the chair back instead of lifting the chair back.
Jack: 'Yes' they are, they move the chair and reduce the friction.
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उत्तर
Do it yourself.
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