3
lesson pretestMultiple Choice

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Question 3 • Physics I

Juan and Kuri are on a carousel. Juan is closer to the center of the carousel than Kuri. Which statement describes their tangential speeds?

Answer
A
Juan and Kuri complete one revolution in the same time, but Juan travels a shorter distance and has a lower speed.
B
Juan moves a shorter distance in less time than Kuri, but their speeds are the same.
C
Juan and Kuri complete one revolution in the same time, so they have the same speed.
D
Juan and Kuri move the same distance in one revolution, but Juan completes the revolution in less time and has a higher speed.

Explanation

Both riders rotate with the carousel, so they take the same time to complete one revolution. Juan is closer to the center, so his circular path has a smaller circumference and he travels a shorter distance in that time. Since speed is distance divided by time, Juan has the lower tangential speed; choice A describes this.

AI-written and checked against the verified answer.

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