In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

This force is represented by a first derivative with respect to position in the harmonic oscillator equation. In one model, this force stems from tiny electrostatic repulsions. It can be understood as the parallel shear component of the contact force, whose other component is typically calculated as mg cosine theta. It is calculated from a coefficient, symbolized mu, multiplied by the normal force. Rolling motion is affected by the "kinetic" type of this force, which is known as "drag" in fluids. For 10 points, name this force that resists the motion of objects against one another.
Science

A tree can be seen in the background of this work through a window bisected by a stone column. Beneath the window lies a series of chests, one of which is being searched through by a child in white. The childs caretaker, carrying a large gold and blue garment, looks after the child while on the right a small brown and white dog sleeps peacefully on a couch. Tapestries line the walls near the chests and green and beige tiles line the floor, and a green curtain obscures the back left portion of the room. On a red couch in front of the curtain rests the title character, who holds pink flowers in her hand as she stares at the viewer. For 10 points, name this painting by Titian.
Fine Arts

Increased support to guerrillas in this nation was carried out under Operation Cyclone. Recently, doubt has been cast on operations in this nation such as the Nangar Khel after release of Wikileaks cables, which also contained reports of Pakistani complicity with insurgents seeking to destabilize the government of Hamid Karzai. For 10 points, name this nation which is partially controlled by the Taliban.

History