The bob of a simple one of these moves with simple periodic motion
[DOC] [TLE] Chapter 23 Simple Harmonic Motion - MIT [PAR] 23.2.1 General Solution of Simple Harmonic Oscillator Equation ...................... .... 
measured by these clocks after making repeated land and sea trials, the effects of 
... One of the most important examples of periodic motion is simple harmonic 
motion ..... point-like object of mass m attached to one end, called the bob.