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Question

A block having a mass of 500 g is tied to a thread having a length of 35 cm. The block is pulled sideward such that the thread makes an angle of 6° with respect to vertical and then released. The block oscillates with a damping constant of 0.005 kg/s. Determine the number of oscillations after 30 s and also the fraction of energy lost.

Diagram of a pendulum with a 35 cm thread at a 6° angle, illustrating periodic motion.

Accepted Answer

25 oscillations, lost = 25.9 %

Answer

30 oscillations, lost = 5.22 %

Answer

10 oscillations, lost = 25.9 %

Answer

25 oscillations, lost = 10.2 %