Question

Arlene is to walk across a high wire. What physical quantity must be carefully controlled to maintain her balance?

a) Velocity
b) Acceleration
c) Force
d) Torque

Answer 1

To maintain balance on a high wire, Arlene needs to control the physical quantity of torque, which is affected by the forces applied and her center of gravity in relation to the wire.

Step-by-step explanation:

Arlene must carefully control the physical quantity known as torque to maintain her balance while walking across a high wire. Torque is the rotational equivalent of force and is a measure of the effectiveness of a force in changing or accelerating a rotation. When walking on a tightrope, the amount of torque on Arlene's body is affected by factors such as the magnitude and direction of forces applied. It is also influenced by the position of her center of gravity relative to the wire. The correct balance of torque ensures that the rotational forces acting on Arlene will not cause her to tip and potentially fall.