Science, asked by laljeetc7, 2 months ago

14.
is used to reduce the friction in moving parts of the machines
A. Oil or grease
B. Sand C. Water
D. Petrol
15. Friction is useful for us, how?
A. It helps us in walking
B. To apply brakes
C. To run machines and motors D. All

Answers

Answered by deva7114215

0

Answer:

14 - Oil or grease

15 - all

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