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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. What is a fulcrum?
(a) A point at which inertia is overcome.
(b) A formula for determining energy needed to do work.
(c) A special sort of wedge.
(d) A pivot point.

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

3. What is an example of a second-class lever?
(a) A crane.
(b) A clock.
(c) An engine block system.
(d) A nutcracker.

4. Upon what principle does a pulley work?
(a) It is easier to pull something down rather than up.
(b) It is easier to overcome gravity than force.
(c) The amount of work required is halved by the amount of effort.
(d) The rotation of one gear pulls the other.

5. The rack and pinion is an example of ______________.
(a) A gear.
(b) A stifle.
(c) A lever.
(d) A wedge.

Short Answer Questions

1. What does a driving force initiate?

2. What is the principle behind the action of any machine?

3. What is the principle that states energy is neither created nor destroyed?

4. What does one have to understand in order to understand the way things work?

5. How does a zipper operate?

(see the answer key)

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