A 10-Kg Block on a Horizontal Frictionless Surface Is Attached

question 42

Multiple Choice

A 10-kg block on a horizontal frictionless surface is attached to a light spring (force constant = 1.2 kN/m) .The block is initially at rest at its equilibrium position when a force (magnitude P) acting parallel to the surface is applied to the block,as shown.When the block is 8.0 cm from the equilibrium position,it has a speed of 0.80 m/s.How much work is done on the block by the force P as the block moves the 8.0 cm?

• A)8.3 J
• B)6.4 J
• C)7.0 J
• D)7.7 J
• E)3.9 J

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Definitions:

ADH

Antidiuretic Hormone, also known as vasopressin; a hormone released by the pituitary gland that regulates water balance in the body by reducing urine output.

Collecting Duct

Part of the nephron in the kidney that is responsible for the concentration of urine and the reabsorption of water into the bloodstream.

Malpighian Tubules

Excretory structures found in some insects that remove waste products from the body and maintain osmotic balance.

Urinary System

The body system in vertebrates that consists of the kidneys, urinary bladder, and associated ducts.