1K20.20 Area Dependence Of Friction

1K20.20 Area Dependence Of Friction

Compare and contrast area and friction.

A block covered in sandpaper rests on a scrap plank. The block's largest surface area is face-down on the plank. Two 1-kg masses stand on top of the block. A short string is tied to a hook screwed into the front of the block. A spring scale is hooked to the other end of the string. The scale is held nearly horizontally and reads 16 N.

High friction, large area

High friction, small area

Low friction, large area

Low friction, small area

Location: Block: B4-4, Scale: HI-1, Weights: FG-7