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in Physics by (67.7k points)
A pendulum of mass 1 kg and length  = 1m is released from rest at angle  = 60º. The power delivered by all the forces acting on the bob at angle  = 30º will be: (g = 10 m/s2)
A. 13.4 W
B. 20.4 W
C. 24.6 W
D. zero

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