Question

At equilibrium in the Cavendish balance, the gravitational torque equals ______.

Options

• The applied external force

• The restoring torque of the suspension wire

• The mass of the small spheres

• The angle of twist of the wire

Answer 1

At equilibrium in the Cavendish balance, the gravitational torque equals the restoring torque of the suspension wire.

Explanation:

At equilibrium, the twisting stops when the restoring torque (Kθ) generated by the elastic property of the suspension wire becomes equal to the gravitational torque (F·L).