Listen NCERT Audio Books to boost your productivity and retention power by 2X.
What kind of friction comes into play:
(a) when a block of wood kept on table moves slowly ?
(b) when a block of wood kept on table just tends to move (or slip)?
(c) when a block of wood kept on cylindrical iron rods moves?
(a) Sliding friction
(b) Static friction
(c) Rolling friction
When a pencil cell is released from a certain point on an inclined wooden board, it travels a distance of 35 cm on floor A before it comes to rest. When the same pencil cell is released from the same point on the same inclined board, it travels a distance of 20 cm on floor B before coming to rest. Which floor, A or B, offers greater friction? Give reason for your answer.