Wilbur wright starts a paragraph on the bottom of page 16 that doesn’t end until the top of page 18. review the key ideas of this section and sort them into the correct order.
1. key idea 1
wilbur estimates they will need at least an engine weighing one hundred pounds.
2. key idea 2
wilbur and orville confirm the existence of the tangential force.
3. key idea 3
wind resistance is a concern that needs to be solved.
4. key idea 4
he estimates the first flying machine will only reach low speeds.
5. key idea 5
travel by land and water were solved in the nineteenth century.
6. key idea 6
the twentieth century will solve the problem of flight.