Pendulum velocity 

Pendulum/long/times per minute 

1                  /5       /7

1                 /2.5    /10

1                /10      /5

Conclusion

The problem here is that if the pendulum is bigger it will go slowest 

And if is shorter it will go faster as we can see in the table using the 

Same pendulum but make him larger or shorter because it takes less

to do a swing when is shorter and vice versa 

Drawing of conclusion 

          |

          |                 =5 swings per Minut            

            |

            |

       O 

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            |                     = 7swings per minut

            

            |

       O                      

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            |                   = 10 swings per minut

       O