Physics
When the milk is churned vigorously the cream from it is separated out due to

Centripetal force
Frictional force
Gravitational force
Centrifugal force

ANSWER DOWNLOAD EXAMIANS APP

Physics
It is easier to roll a stone up a sloping road than to lift it vertical upwards because

Work done in rolling is more than in lifting.
Work done in both is same but the rate of doing work is less in rolling.
Work done in lifting the stone is equal to rolling it.
Work done in rolling a stone is less than in lifting it.

ANSWER DOWNLOAD EXAMIANS APP