A 20-Kg Block on a Horizontal Surface Is Attached to a Light

question 56

Multiple Choice

A 20-kg block on a horizontal surface is attached to a light spring (force constant = 8.0 kN/m) . The block is pulled 10 cm to the right from its equilibrium position and released from rest. When the block has moved 2.0 cm toward its equilibrium position, its kinetic energy is 13 J. How much work is done by the frictional force on the block as it moves the 2.0 cm?

• A) −2.5 J
• B) −1.4 J
• C) −3.0 J
• D) −1.9 J
• E) −14 J

---

Definitions:

Kinesthetic

Relating to kinesthetic learning, a style that involves learning through physical activities rather than sitting and listening.

Visual Learners

Individuals who comprehend and remember information best by seeing or visualizing materials.

Aural

Relating to the ear or the sense of hearing.

Read/Write

The basic literacy skills involving the ability to understand written text and express thoughts in written form.