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This quiz consists of 5 multiple choice and 5 short answer questions through Part 1, The Mechanics of Movement.

Multiple Choice Questions

1. How does a zipper operate?
(a) The use of triangular wedges and lower curved wedges.
(b) Just lower curved wedges.
(c) Just using triangular wedges.
(d) It is not a wedge system, but rather a rolling arc system.

2. How many forces hold things together?
(a) Four.
(b) Two.
(c) One.
(d) Three.

3. What happens when you exert your strength across a longer distance?
(a) Your effort is reduced, but your strength has to be increased.
(b) Your effort is reduced so you can take advantage of your greater strength.
(c) Nothing happens. It is all balanced by the decreased work required.
(d) Your effort is reduced, and your lesser strength becomes sufficient.

4. How many types of gears are there?
(a) One.
(b) Four.
(c) Five.
(d) Seven.

5. What is the principle behind the action of any machine?
(a) The amount of energy it expends.
(b) The type of energy it takes to make the machine work.
(c) The conservation of energy.
(d) The amount of energy it saves.

Short Answer Questions

1. What is another type of wedge the author mentions?

2. What does the picture of a mammoth pulling a merry-go-round illustrate?

3. What is one component of a lever?

4. What do you have to use in order to accomplish work with half the effort?

5. What is the most common form of inclined plane found in machines?

(see the answer key)

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