substance such as oil that decreases friction
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Graphite, ball bearings, boric powder (used for carrom board), water in some cases etc.
subh6:
wrong answer
how
the substances i mentioned are used in different places.
Oop
lubricant
answer
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1
1.ball bearing in motor decrease friction
2. sand throw in land decrease friction
2. sand throw in land decrease friction
wrong answer
but correct answer
lubricant answer
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