1. How science works
The pendulum

2. 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.

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

5. 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

6. 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

7. 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?

9. 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.

10. 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