A Rock Is Dropped from the Top of a Vertical

question 34

Multiple Choice

A rock is dropped from the top of a vertical cliff and takes 3.00 s to reach the ground below the cliff. A second rock is thrown vertically from the cliff, and it takes this rock 2.00 s to reach the ground below the cliff from the time it is released. With what velocity was the second rock thrown, assuming no air resistance?

• A) 4.76 m/s upward
• B) 5.51 m/s downward
• C) 12.3 m/s upward
• D) 4.76 m/s downward
• E) 12.3 m/s downward

---

Definitions:

Identical Product

A product that is exactly the same as another in every way, making it indistinguishable in terms of quality, appearance, and function.

Economies of Scale

This concept describes the cost advantage achieved by an enterprise when production becomes efficient, resulting in a decrease in the per-unit cost as output increases.

Perfect Competition

describes a theoretical market structure characterized by many buyers and sellers, homogenous products, and free entry and exit, leading to optimal distribution of goods and services.

Barriers to Entry

Obstacles that make it difficult for new competitors to enter a market, such as high startup costs, strict regulations, or established brand loyalty.