Four Identical Blocks Are Moving on a Surface for Which

question 54

Multiple Choice

Four identical blocks are moving on a surface for which the coefficient of kinetic friction between each block and the surface is µ_k. The velocity of each block is indicated by the vector on the block. For which block is the force of friction between the surface and the block greatest?

• A) 1
• B) 2
• C) 3
• D) 4
• E) The force of friction is the same for all blocks.

---

Definitions:

American Big Business

Large-scale, corporate enterprises that emerged in the United States during the 19th and early 20th centuries, often characterized by monopolistic practices, significant economic power, and influence over government policies.

Defense Industry

An industry involved in the production of technology, equipment, and services for the purpose of national defense and security.

Office of War Mobilization

A U.S. government agency during World War II that coordinated all government agencies involved in the war effort.

Franklin Roosevelt

The 32nd President of the United States, serving from 1933 until his death in 1945, known for leading the U.S. through the Great Depression and World War II.