Question

Law of isochronism

(a) states the time period (tp ) of a simple pendulum does not depend upon the mass of the body suspended at the free end of the string.

(b) states the time period (tp ) of a simple pendulum does not depend upon its amplitude of vibration and remains the same, provided the angular amplitude (θ) does not exceed 4°.

(c) states the time period (tp) of a simple pendulum is directly proportional to √L , where L is the length of the string.

(d) none of the mentioned

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This key question is from Centre of Percussion in section Simple Harmonic Motion of Machine Kinematics

Answer 1

Right choice is (b) states the time period (tp ) of a simple pendulum does not depend upon its amplitude of vibration and remains the same, provided the angular amplitude (θ) does not exceed 4°.

The explanation is: It states the time period (tp ) of a simple pendulum does not depend upon its amplitude of vibration and remains the same, provided the angular amplitude (θ) does not exceed 4°.