16. A scientist wishes to investigate the effects of the angle and the size of t

Question

16. A scientist wishes to investigate the effects of the angle and the size of the pendulum ball on the period. To facilitate this investigation, the scientist uses two pendulum balls with identical mass, one large diameter and one small diameter. He mounts both pendulum balls on the same length of string. In Experiment I, he uses a large angle and the small pendulum ball. In Experiment II, he uses a small angle and the small pendulum ball, and in Experiment III, he uses a large angle and the large pendulum ball. Which of the experiments is the control experiment?

A) Experiment I

B) Experiment II

C) Experiment III

D) Experiment I and Experiment II together

Explanation / Answer

Experiment II will be sufficient to because both in I and III we employ a large angle but the basic fundamental for large angle goes wrong that sinx is not equa to x. hence we cannot obtain the final expression.

hence we should be working with small angles.

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