When the teeth of one gear contact the roots of its mating gear,this is known as:

A) climbing
B) zero lash
C) bottoming
D) clashing

Mating Gear

Refers to a gear that engages with another gear to transmit force and motion in mechanical systems.

Climbing

A gear problem caused by excessive wear in intermeshing gears or bearings. Climbing occurs when intermeshing gears move apart sufficiently for one gear to climb over the apex of its mate.

Zero Lash

The condition or adjustment in a mechanical system where there is no slack or play between the parts, resulting in precise and immediate response to input.