QUIZ 1. What is the relationship between the rotation angle, the arc length and the radius of a circle? a. Rotation angle is directly proportional to the arc length and the radius of a circle. b. Rotation angle is directly proportional to the arc length and inversely proportional to the radius of a circle. c. Rotation angle is inversely proportional to the arc length and directly proportional to the radius of a circle. d. Rotation angle in inversely proportional to the arc length and the radius of a circle. Answer: b. The rotation angle is directly proportional to the arc length and inversely proportional to the radius of a circle. 2. What is the number of radians in a complete revolution around a circle? a. pi radians b. 0.5 pi radians c. 2 pi radians d. 2 pi squared radians Answer: c. The totality of a circle or a complete revolution covers an angle that is considered to be 2-pi radians. 3. The greatest possible speed of a tire happens at a certain point at the rim of the tire. What is that speed called? a. Arc speed b. Angular speed c. Tangential speed d. Linear speed
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