A Rock Is Thrown Directly Upward from the Edge of a Flat

question 71

Short Answer

A rock is thrown directly upward from the edge of a flat roof of a building that is 56.3 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Take the acceleration due to gravity to have magnitude $9.80 \mathrm {~m} / \mathrm { s } ^ { 2 }$ and neglect any effects of air resistance. With what speed was the rock thrown?

---

Definitions:

Functional Fixedness

A cognitive bias that limits a person to use an object only in the way it is traditionally used, hindering the ability to see alternative uses.

Standardization

The development of uniform procedures for administering and scoring a test, and the creation of norms (performance standards) for the test.

Norms

Shared expectations or rules within a group or culture about how to behave.

Consistent Result

Outcomes or findings that are reliably reproducible under the same conditions, indicating reliability and validity in scientific or analytical experiments.