A small coin is placed on a record rotating at rev/minute. The coin does not slip on the record. Where does it get the required centripetal force from?

Question

Philoid · Accepted Answer

If a coin is placed on a rotating record, because of the centrifugal force the coin will have tendency to slip on the record, but

because of the frictional force present between the coin and record it will balance that centripetal force. Therefore, the coin remains on the record itself without slipping away.