A small rock is thrown vertically upward with a speed of 18.0 m/s from the edge of the roof of a 30.0-m-tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected. What is the speed of the rock just before it hits the street? O 27.3 m/s O 15.1 m/s O 18.0 m/s 30.2 m/s

A small rock is thrown vertically upward with a speed of 18.0 m/s from the edge of the roof of a 30.0-m-tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected. What is the speed of the rock just before it hits the street? O 27.3 m/s O 15.1 m/s O 18.0 m/s 30.2 m/s

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.

Question

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A small rock is thrown vertically upward
with a speed of 18.0 m/s from the edge of
the roof of a 30.0-m-tall building. The rock
doesn't hit the building on its way back
down and lands in the street below. Air
resistance can be neglected. What is the
speed of the rock just before it hits the
street?
O 27.3 m/s
O 15.1 m/s
O 18.0 m/s
O 30.2 m/s

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