Subject- Science ( Semi Engl
Std-6th. J.V.Sonambe.
Sub Teacher- Deepak Bhalerao, sir
SELF STUDY SERIES
विद्यार्थी मित्रांनो,
खाली दिलेला स्वाध्याय नीट वाचा व आपल्या पुस्तकात पाहून उत्तरे लिहा.कोणतेही गाईड व व्यवसाय पुस्तिकांचा आधार घेऊ नका
Simple machines
1) The machines which have only one or two parts and a simple and easy structure such machines are called ..... machines
2) the machines which have many parts which carry out many processes for completing a task for this purpose the parts are joined to one another therefore these machines are called ....... machines
3) if a slanting plank is used to lift a weight we have to bear less of the weight and lifting it becomes easier. such a plank is called an ......
4) the Greek scientist Archimedes invented the machine shown in this picture that is why it is called the ...... screw
5) a sharp tool is formed on joining two inclined planes such a tool is called a.....
6) a farmer is using a strong crow-bar to remove the big stone Bogged down in the farm such a machine is called a.....
7) A lever has three parts namely effort, load and.....
8) the support at which the role of a lever is rested is called the....
9). The weight lifted by lever or the force against which the lever acts is called the.....
10). The arm of the lever from the fulcrum to the load is called the.....
11). The force applied on the other end of the rod to lift the load is called the.....
12). The part of the lever from the fulcrum to the effort is called the.....
13). There are three types of lever depending upon the positions of the effort the fulcrum and the load
i) load- fulcrum -effort
ii) Fulcrum -load- effort
iii) fulcrum - effort -.......
14). The device with a grooved wheel and thread design to lift weights is called a.....
15). The giant wheel is fitted to a rod at its centre this road
is called an.....
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