Question

1. Key Idea 1 4 Wilbur and Orville confirm the existence of tangential force. 2. Key Idea 3 2 Wind resistance is a concern that needs to be solved. 3. Key Idea 2 6 He estimates the first flying machine will only reach low speeds. 4. Key Idea 4 1 Travel by land and water were solved in the nineteenth century. 5. Key Idea 6 3 The twentieth century will solve the problem of flight. 6. Key Idea 5 5 Wilbur estimates they will need at least an engine weighing one hundred pounds.

Answer 1

Explanation:

Mr. Wilbur Wright, Dayton, Ohio engines have been lightened down to 12 1/2 to 15 pounds per horsepower, so that the status ... that, for some limited purposes at least, man will eventually be able to fly through .