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This test consists of 5 multiple choice questions, 5 short answer questions, and 10 short essay questions.

Multiple Choice Questions

1. What are two things a sail can do for a craft?
(a) Propel and stop.
(b) Give pulpulsion and direction.
(c) Lift and Slow.
(d) Propel and repel.

2. When an object absorbs light rays, how is the energy held in the object?
(a) As inertial energy.
(b) As kinetic energy.
(c) There is no energy involved.
(d) As heat.

3. What happens when molecules are squeezed or stretched beyond the boundaries of their comfortable balance?
(a) The molecules are driven to return to that balance.
(b) The molecules are driven to remain unbalanced.
(c) The molecules dissipate into individual atoms that can be lost or destroyed.
(d) They remain in an uneasy balance.

4. What is a first-class lever?
(a) Where the effort is a greater distance from the fulcrum than the load.
(b) Where there is no load needed for the effort.
(c) Where the distance is further from the fulcrum than the effort.
(d) Where the effort and the load are equal distances from the fulcrum.

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

Short Answer Questions

1. What does the inclined plane do?

2. What is an example of a second-class lever?

3. Where is steam still used?

4. What is the resistance of an object to any change in its speed or direction?

5. What controls direction on a ship?

Short Essay Questions

1. What is the most common form of inclined plane in machines? How does it work?

2. Describe how a door wedge works.

3. How does a ship use plimsoll lines?

4. How does the inclined plane require less strength for a task?

5. Discuss the four types of gears.

6. How is nuclear power generated? What is one naturally occurring nuclear fusion?

7. Discuss fulcrum points as pertaining to levers.

8. What does the principle of the conservation of energy state? How does Part 1 relate to that principle?

9. How does a zipper work?

10. Discuss what happens when a driving force initiates movement.

(see the answer keys)

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