A pendulum has a center of mass a length D from the pivot point. What is the res

Question

A pendulum has a center of mass a length D from the pivot point. What is the restoring torque due to gravity if it is pulled away from equilibrium by an angle ?? choose the correct answer mgD mgD cos(?) mg sin(?) mgD sin(?) 2) Which pendulum swings slowest? choose the correct answer A pendulum made from a wooden meter stick, swinging from one end. A pendulum made from a heavy steel meter stick, swinging from one end. A pendulum made from a heavy metal washer, hanging from a string 1 meter long. A pendulum made from a ruler, 30 cm long, hanging from one end. 3) see the picture in this link http://i50.tinypic.com/fwtvzd.png what would the period of a hoop be? T = 2? sqrt(3R/2g) T = 2? sqrt(2R/g) T = 2? sqrt(2R/3g) T = 2? sqrt(R/2g)

Explanation / Answer

a) x = L/2 b) T = 2pv[I/(mgL)] = 2pv[L/(3g)] = 1.27 sec Source(s): My 'cheat sheet' of physics formulae

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