A five pulley system is used to lift a load of 200N. If the effort required is 50n
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is MA, VR and Efficiency

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Machine

Subject: Science

Home Grade 9 Science Machine Machine

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Syllabus

Measurement

Force

Machine

Machine

Types of Simple Machine

Moment

Work Energy and Power

Sound

Light

Electricity and Magnetism

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Overview

Simple machine helps us by magnifying force, accelerating work and by changing the direction of force. This notes gives us the information about machine, its importance, mechanical advantage, velocity ratio.

Note

Things to remember

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Exercise

Quiz

Machine

We use various tools to perform different types of work in our daily life. The tools or simple devices used for making our work easier, faster and more convenient are simple machines.

Those tools or devices which make our work easier and convenient in the direction of the force is called simple machine.

Purpose of using simple machine

Simple machines are used to make our work easier in the following ways:

By multiplying force.

By changing the directions of force.

By transferring force from one point to another.

By increasing the rate of doing work.

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+15-35=-20

going in opposite directions

answerdmitry mendeleyev made a workable classification of the elements