A) 360 Hz
B) 280 Hz
C) 560 Hz
D) 56 Hz
Correct Answer: D
Solution :
Time of fall = \[\sqrt{\frac{2h}{g}}\]\[=\sqrt{\frac{2\times 10}{1000}}=\frac{1}{\sqrt{50}}\] In this time number of oscillations are eight. So time for 1 oscillation =\[\frac{1}{8\sqrt{50}}\] Frequency =\[8\sqrt{50}\,Hz\] = 56\[Hz\]You need to login to perform this action.
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