1.

The bob of a pendulum of length l is pulled aside from its equilibrium position through an angle \[\theta \] and then released. The bob will then pass through its equilibrium position with a speed v, where v equals                                                  [Haryana CEE 1996]

A. \[U=K{{X}^{2}}\]
B. \[\sqrt{2gl(1+\cos \theta )}\]
C. \[U=KX\]
D. \[\frac{a}{2}\]
Answer» D. \[\frac{a}{2}\]


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