Question

Kumaran went to a shop near his house on a bicycle. The bicycle made a
lot of noise when he pedalled it. After coming home, he applied some oil on
some parts of the bicycle. Then there was no noise, why?

TNSCERT Class 8 Science Ch7. Force and Pressure

Answer 1

.....because cycle's some parts like chain , wheel , brakes and wires get rusted and need oiling through to time to time. That's why when kumaran oiled the parts there was no noise