Explain why the surface of mortar and pestle (silbatta) used for
grinding is etched again after prolonged use?
NCERT Class VIII
Science - Exemplar Problems
Chapter 12. Friction
Answers
Answered by
138
Hi,
Here is the answer to your query:-
After prolonged use, the mortar and pestle(silbatta)loose the roughness due to which frictional force reduces and it does not work. So, we have to etch it to make it rough again.
Hope it helps you....
plz mark as brainliest......
Here is the answer to your query:-
After prolonged use, the mortar and pestle(silbatta)loose the roughness due to which frictional force reduces and it does not work. So, we have to etch it to make it rough again.
Hope it helps you....
plz mark as brainliest......
Answered by
21
After prolonged use , the surface of mortar and pestle become smooth and friction between them decreases . It is a etched against to increase the friction between them and make it more effective for grinding again .
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