Grade 9 Physics
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Grade 9 Science Experiment 2 - Pendulums and Springs - How does a pendulum clock keep time?



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  • This is a downloadable e-book program.

  • You will NOT receive a physical package shipped to you in the mail.

  • Once you have made your payment via PayPal, select the option to return to this website

  • You will be returned to the download page where you can immediately download all 5 projects and get started right away.

  • This program is NOT available in stores, so you can only access it through this website.


If anything goes wrong with your purchase, and you did not get to the download page, please contact me and I'll email you the download link (this could take up to 24 hours)


Purpose: 


The purpose of this science fair project is to demonstrate the physics of pendulums and strings.  Grandfather clocks use a pendulum to keep time.  A pendulum consists of an item that hangs from a fixed point with a weight at the bottom of it called a "bob".  This hanging item and its bob are free to swing in a downward motion by the force of gravity followed by an outward and upward motion.  The direction the pendulum and bob travels is due to its inertia when it is pulled back and released.


Inertia refers to the principle that when a body is in motion it stays in motion and when a body is at rest it stays at rest unless it is acted upon by an outside force.  In this science fair project, the outside force occurs when you pull back and release the pendulum from varying heights and starting positions.


Hypothesis:  


height at which you pull back and release a pendulum affects the amplitude and speed of the pendulum.  The length of the pendulum and weight of the bob will affect the speed of the pendulum.


Variables: 


1. Height at which you release the pendulum

2. Length of the pendulum

3. Weight of the bob on the pendulum

4. Amplitude of the pendulum swing


Materials Needed:


  • Tongue depressor
  • Tape
  • String
  • Paper Clip
  • Washers
  • Scissors
  • Pencil
  • Paper
  • Ruler
  • Edge of a desk or flat surface

Buy ALL 5 Grade 9 Physics Projects for only $1.00:


Read This Before Placing your Order:


  • This is a downloadable e-book program.

  • You will NOT receive a physical package shipped to you in the mail.

  • Once you have made your payment via PayPal, select the option to return to this website

  • You will be returned to the download page where you can immediately download all 5 projects and get started right away.

  • This program is NOT available in stores, so you can only access it through this website.


If anything goes wrong with your purchase, and you did not get to the download page, please contact me and I'll email you the download link (this could take up to 24 hours)



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