How science works The pendulum

Science Technology & Society Galileo Galilei (1564 – 1642) STS Science Technology & Society In 1582, while praying in a chapel, Galileo observed a lamp swinging. Timing the swings against his own heartbeat, Galileo discovered that no matter how wide an arc the lamps made, the time it took swinging from one side to the other was the same, even as the size of the arc decreased. Galileo discovered the law that made pendulums useful as clocks.

Formulating hypothesis What are the factors affecting the time or the period of the oscillation of the swing?

Formulating hypothesis The period of the pendulum is: dependent on /independent of the colour of the ball dependent on/independent of the amplitude of the swing dependent on/independent of the mass of the ball dependent on/independent of the length of the pendulum dependent of ...........

I will measure during the experiment Remember Variables are anything that might change or be changed in an experiment. Variable This is the thing Dependent (manipulated) I will change during the experiment. It is the only thing that should change. Independent (responding) I will measure during the experiment control that never changes

Conducting the experiment Design experiments to check which variables there are and how they affect the motion of a pendulum. You must answer the questions: What will I need? What should I do?

Make your data presentable with graphs and tables Check your predictions in the lab or using the animation Make your data presentable with graphs and tables Were your predictions correct? Explain your answer. Draw conclusions, analyse problems and determine the need for any future investigations.

Which one swings faster? They go the same speed 1 is faster 2 is faster Shorter one is faster Since no friction, both go back to initial angle