A set of keys on the end of a string is swung steadilyin a horizontal circle. In one
Chapter 4, Problem 11(choose chapter or problem)
A set of keys on the end of a string is swung steadilyin a horizontal circle. In one trial, it moves at speedv in a circle of radius r. In a second trial, it moves at ahigher speed 4v in a circle of radius 4r. In the secondtrial, how does the period of its motion compare withits period in the first trial? (a) It is the same as in thefirst trial. (b) It is 4 times larger. (c) It is one-fourth aslarge. (d) It is 16 times larger. (e) It is one-sixteenth aslarge.
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