Answer:
τ = 0.009 Nm
Step-by-step explanation:
The torque applied on the tooth can be given by the following formula:

where,
τ = Torque on the tooth= ?
F = Force acting on tooth = 9 N
d = distance between force and tooth axis = 1 mm = 0.001 m
Therefore, using these values in the equation, we get:

τ = 0.009 Nm