bears a constant ratio to the normal reaction between the two surfaces

is independent of the area of contact, between the two surfaces

always acts in a direction, opposite to that in which the body tends to move

all of the above

2 mm

2.22 mm

2.50 mm

3.0 mm

90 Degree and 180 Degree

45 Degree and 225 Degree

180 Degree and 270 Degree

270 Degree and 360 Degree

pitch circle

base circle

pitch curve

prime circle

Right

Wrong