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A car is moving towards North. What will be the direction of force of friction acting on this car due to surface of road ?
The direction of force of friction acting on this car due to surface of road is along the south direction i.e. opposite to the direction of motion.
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.