SOLUTION: a pendulum consist of a mass hanging at the end of a string which is 18cm long. find the vertical height through which the mass rises and falls as the pendulum swings through 30deg

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Question 1141860: a pendulum consist of a mass hanging at the end of a string which is 18cm long. find the vertical height through which the mass rises and falls as the pendulum swings through 30degree on each side of the vertical .draw e sketch showing the given formation
Answer by ikleyn(52886) About Me  (Show Source):
You can put this solution on YOUR website!
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The vertical height under the question is


    18 - 18*cos(30°) = 18%2A%281+-+sqrt%283%29%2F2%29%29 = 2.41 cm (approximately).    ANSWER