Three Books (X, Y, and Z) Rest on a Table

question 47

Multiple Choice

Three books (X, Y, and Z) rest on a table. The weight of each book is indicated. The net force acting on book Y is:

• A) 4 N down
• B) 5 N up
• C) 9 N down
• D) zero
• E) none of these

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Definitions:

Keratitis

Inflammation of the cornea, the clear outer layer at the front of the eye, potentially caused by infection or injury.

Blepharitis

An inflammation of the eyelid margins, often causing redness, irritation, and itchy eyelids together with dandruff-like scales on the eyelashes.

Lacrimal

Pertaining to the glands and ducts that produce and drain tears.

Cortex

The outer layer of various organs and structures, such as the brain, adrenal glands, and hair, involved in diverse functions.