A Block Is Pushed Across a Rough Horizontal Surface from Point

question 14

Multiple Choice

A block is pushed across a rough horizontal surface from point A to point B by a force (magnitude P = 5.4 N) as shown in the figure. The magnitude of the force of friction acting on the block between A and B is 1.2 N and points A and B are 0.5 m apart. If the kinetic energies of the block at A and B are 4.0 J and 5.6 J, respectively, how much work is done on the block by the force P between A and B?

• A)2.7 J
• B)1.0 J
• C)2.2 J
• D)1.6 J
• E)3.2 J

---

Definitions:

Enlist

To voluntarily sign up for military service or, more broadly, to join an organization or cause.

Union Forces

The armed forces of the United States (the North) during the American Civil War.

1863

The year 1863 is notable for several historical events, including the Emancipation Proclamation in the United States, which declared the freedom of slaves in Confederate-held territory during the American Civil War.

Northern Soldiers

Refers to the soldiers from the Union states who fought in the American Civil War against the Confederate states of the South.