In the figure shown the time period and the amplitude respectively, when \( m \) is left from re...

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In the figure shown the time period and the amplitude respectively, when \( m \) is left from rest when spring is relaxed are (the inclined plane is smooth)
(a) \( 2 \pi \sqrt{\frac{m}{k}}, \frac{m g \sin \theta}{k} \)
(b) \( 2 \pi \sqrt{\frac{m \sin \theta}{k}}, \frac{2 m g \sin \theta}{k} \)
(c) \( 2 \pi \sqrt{\frac{m}{k}}, \frac{m g \cos \theta}{k} \)
(d) None of these
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