Question

7. A steel band exerts a horizontal force of 80.0 N on a tooth
at point B in Figure 7.3. What is the torque on the root of
the tooth about point A?
Gum
48.0°
A
F
1.20 cm

Answer 1

The torque experienced by the root of the tooth about point A when the steel band exerts the given force is 0.713 Nm.

Torque about point A

The torque experienced by the root of the tooth about point A is calculated as follows;

τ = rFsinθ

where;

• F is applied force
• r is the perpendicular distance

τ = (0.012) x (80) x (sin 48)

τ = 0.713 Nm

Thus, the torque experienced by the root of the tooth about point A when the steel band exerts the given force is 0.713 Nm.

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