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This quiz consists of 5 multiple choice and 5 short answer questions through Part 2, Harnassing the Elements, Introduction, Floating, Flying and Pressure Power, pp.91-141.

Multiple Choice Questions

1. What happens if the edges of the two wheels touch?
(a) The one will stop the other wheel.
(b) Nothing unless they have cams.
(c) The rotation of one will cause the other to rotate.
(d) The one wheel will wear out faster than the other.

2. What is another type of wedge the author mentions?
(a) The inversion ring.
(b) The sharp tapered edge of axes.
(c) The caliper.
(d) The gate latch.

3. What principle is in use as a propeller pushes the water back and as that same water which has been pushed back rolls forward again and hits the propeller?
(a) The Principle of Gravity.
(b) The Principle of Force and Inertia.
(c) The Principle of Push and Thrust.
(d) The Principle of Action and Reaction.

4. What does a driving force initiate?
(a) Inertia.
(b) Work.
(c) Movement.
(d) Electron activity.

5. What is the most common form of inclined plane found in machines?
(a) The rods.
(b) The pully.
(c) The rocker.
(d) The wedge.

Short Answer Questions

1. What is applied to a lever to make it move?

2. What additional tasks can a boat with two triangular sails do?

3. What is one example the author uses of a wedge?

4. How does floating harness the power obtained by squeezing or stretching molecules?

5. What is the formula for work done?

(see the answer key)

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