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

question 32

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:

Stratigraphic Timeline

A chronological ordering of layered sedimentary rocks, representing the sequential events in the Earth's geologic history.

Mesozoic Era

A major subdivision of geologic time from 251 million years ago (Ma) to 65 Ma; characterized by dinosaurs.

Jurassic Period

A geologic period and system that occurred about 201 to 145 million years ago, known for the prevalence of dinosaurs and the breakup of the supercontinent Pangea.

Numeric Age

Geologic age of a rock, sediment, fossil, or event calculated in thousands, millions, or billions of years before present; synonym: absolute age.