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Physics Work,Power & Energy Level: Misc Level

A simple pendulum with a bob of mass 250 g and length 2.0 m is allowed to fall from a horizontal position. The speed of the bob as it passes the lowest point is: (Assume g=9.8 m//s2)

a. 6.3 m/s

b.39 m/s

c.9.8 m/s

d. 4.9 m/s