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A simple pendulum has a length of 0.75 m and a bob with a mass of 0.15 kg. The bob is released from an angle of 25 degrees relative to the vertical reference line.

a) Show that the vertical height of the bob when it is released is h= L(1-cos25 )

b) What is the kinetic energy of the bob when the string is at an angle of 9 degrees?

c) What is the speed of the bob at the bottom of the wing? (Neglecting friction and the mass of the string)

Oh That’s A Toughy.

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