document.write( "Question 1182465: A pendulum consists 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 30 degree on each side of the vertical
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Algebra.Com's Answer #812520 by ikleyn(52852) $\"\"$ $\"About$

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\n" ); document.write( "A pendulum consists of a mass hanging at the end of a string which is 18cm long.
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document.write( "Let the level of the pendulum suspension point be 0 (zero).\r\n" );
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document.write( "Then the upper level of the mass is   = -18*cos(30°) =  cm.\r\n" );
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document.write( "     the lower level of the mass is   = -18 cm.\r\n" );
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document.write( "Vertical distance between these levels is  \r\n" );
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document.write( "     -  = 18*(1-cos(30°)) =  = 2.412 cm   (rounded).    ANSWER\r\n" );
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