Multiple choice In which of the following cases is more friction needed? Creaking hinge of a door. Between machine parts with less grease. Spilling soapy water on a smooth granite floor in the kitchen. An aeroplane taking off. Carroms being struck on a carrom board. Reveal answer Fill a bubble to check yourself C Correct answer Explanation More friction is needed in an area where there is spilling of soapy water to prevent a person from falling.