This Sample Quiz is provided to give you some idea of the types of questions that could be asked on your Problems Class quiz covering this material. It in no way promises that the material on your quiz will be the same as that covered here. The quizzes are written by the individual Problems Class instructors! Nevertheless, if you are prepared for the quiz, you should be able to answer the questions below.
You observe that a 230-g object is moving in a circle of radius 15 cm with a constant speed. It takes a total time of 2.3 s for the object to move four times around the circle.
1. What is the period of the object’s motion?
(a) 0.12 s (b) 0.35 s (c) 0.58 s (d) 1.2 s (e) 2.3 s
2. What is the linear frequency of the object’s motion?
(a) 0.58 Hz (b) 1.7 Hz (c) 2.6 Hz (d) 3.5 Hz (e) 4.6 Hz
3. With what constant speed is the object moving around the circle?
(a) 1.6 m/s (b) 2.2 m/s (c) 3.5 m/s (d) 4.1 m/s (e) 5.9 m/s
4. What can be said about the acceleration of the object undergoing the circular motion?
(a) It must be zero since the speed is said to be constant.
(b) It must point in the direction of the object’s motion.
(c) It must point towards the center of the circle.
(d) It must point outward, away from the circle’s center.
(e) It always points upwards.
Answers
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