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Page 1 SIMPLE MACHINES Lever A lever is a device that rests on a fulcrum. It is used to lift or move loads. Wheel and Axle The wheel and axle is a simple tool that helps make work easier.The wheel turns around the axle to move objects. Pulley A pulley is a tool with a wheel and a rope. It is used to lift or move loads. Wedge A wedge is a tool that narrows to a thin edge. An ax is an example of a wedge. Screw Screws are simple tools rods with edges around a pole. Inclined Plane An inclined plane is a tool with a flat surface and elevated at one end. An example of an inclined plane is a ramp.Read More
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FAQs on Poster: Simple Machines - Science for Class 4
| 1. What are simple machines and how do they work? |  |
Ans.Simple machines are basic mechanical devices that help us perform work more easily by changing the direction or magnitude of a force. They include the lever, pulley, inclined plane, wheel and axle, screw, and wedge. Each type of simple machine operates on the principle of mechanical advantage, allowing us to lift, move, or hold objects with less effort.
| 2. Can you give examples of simple machines in everyday life? | |
Ans.Examples of simple machines in everyday life include a seesaw (lever), a flagpole (pulley), a ramp (inclined plane), a bicycle (wheel and axle), a jar lid (screw), and a knife (wedge). These machines help us accomplish tasks more efficiently, from lifting heavy objects to cutting through materials.
| 3. How do simple machines make work easier? | |
Ans.Simple machines make work easier by providing a mechanical advantage, which allows a smaller input force to move a larger load. For example, using a lever, you can lift a heavy object with less force by applying pressure on one end, which translates into greater movement on the other end.
| 4. What is the difference between a simple machine and a compound machine? | |
Ans.A simple machine is a basic device with few or no moving parts that is used to perform work, while a compound machine is made up of two or more simple machines working together. For instance, a bicycle is a compound machine that includes wheels (wheel and axle), gears (levers), and brakes (friction).
| 5. Why are simple machines important in engineering and technology? | |
Ans.Simple machines are fundamental to the field of engineering and technology because they form the basis for understanding more complex machinery. They help engineers design systems that maximize efficiency and effectiveness, making it possible to create innovative solutions in various industries, from construction to manufacturing.
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