The friction force is dependent on the materials of the contact surfaces.

The friction force is directly proportional to the normal force.

The friction force is independent of me area of contact.

all of the above

structure

mechanism

kinematic chain

inversion

Agree

Disagree

The addendum is less than the dedendum

The pitch circle diameter is the product of module and number of teeth

The contact ratio means the number of pairs of teeth in contact

all of the these

12

14

18

24