A Simple Pendulum,3

A simple pendulum,3.0 m in length,is released with a push when the support string is at an angle of 20° from the vertical.If the initial speed of the suspended mass is 1.3 m/s when at the release point,what is its speed at the bottom of the swing? (g = 9.8 m/s²)

A) 2.3 m/s
B) 1.9 m/s
C) 6.4 m/s
D) 5.2 m/s
E) ​7.8 m/s

Correct Answer:

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