At a Building Site in Perth, a Tower Crane Is

question 16

Multiple Choice

At a building site in Perth, a tower crane is lifting a 300 kg pallet of bricks upwards at a steady speed. The cable from which the bricks are suspended has a circular cross-section of radius 1 cm. What is the tensile stress in this cable?

• A)9.4x106 N m-2.
• B)9.5x105 N m-2.
• C)95 N m-2.
• D)936 N m-2.
• E)9.4x104 N m-2.

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Definitions:

Contamination

The presence of unwanted substances or impurities in a material, environment, or natural resource, compromising its quality or safety.

Worry

A cognitive process involving the repetitive contemplation of future events that may result in anxiety or stress.

Order/Symmetry

The desire or compulsion to arrange objects in a precise, orderly, or symmetrical manner, often observed in individuals with obsessive-compulsive disorder.

OCD

Obsessive-Compulsive Disorder (OCD) is characterized by the presence of persistent thoughts (obsessions) and repetitive behaviors (compulsions) that an individual feels compelled to perform.