28. Four pendulums, consisting of the following masses suspended from the corresponding lengths of wire, are released from the angles listed. Which of the following listed below will display the most similar periods of oscillation?
I. M = 3kg, L = 2m, released at 2°
II. M = 9kg, L = 2m, released at 3°
III. M=3kg, L= 4 m, released at 3°
IV. M = 3kg, L = 3m, released at 3°
Your Answer is
Correct Answer is F
Explanation
Refer to the analysis of question 27, the period is not affected by mass and angle, so as long as the length is the same, the period should be the same. The length of I and II are both 2 m, so choose F