A 120 N Picture Hangs from a Nail in the Wall

question 85

Multiple Choice

A 120 N picture hangs from a nail in the wall. The maximum shear stress the nail can sustain is 1.00 × 10⁶ N/m². The smallest diameter the nail can be is

• A) 10.5 mm.
• B) 12.4 mm.
• C) 13.7 mm.
• D) 14.4 mm.
• E) 15.9 mm.

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Definitions:

Arachnoid Mater

One of the three layers (meninges) that surround and protect the brain and spinal cord, lying between the dura mater and the pia mater.

Pia Mater

The delicate innermost layer of the meninges, the membranes that envelop the brain and spinal cord, providing protection and support.

Cerebrospinal Fluid (CSF)

The fluid in the subarachnoid space of the meninges and the central canal of the spinal cord.

CNS

Central Nervous System; it comprises the brain and spinal cord, controlling most functions of the body and mind.