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Pendulums. Starter. What is the equation that links time period, T, and frequency, f? T = 1 /f or f = 1 / T What affects the frequency of a simple pendulum? Mass, length, how much it swings? Just length! Why did grandfather clocks have pendulums?

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Starter
Starter

  • What is the equation that links time period, T, and frequency, f?

    T = 1 /f or f = 1 / T

  • What affects the frequency of a simple pendulum? Mass, length, how much it swings?

    Just length!

  • Why did grandfather clocks have pendulums?

    They kept constant time, independent of amplitude or mass

  • What would happen to a pendulum on the moon?


Pendulums1
Pendulums

Rearrangethe pendulum equation to analyse their motion

Investigatethe relationship between length and time period

Identifythe factors that affect the frequency of a pendulum


Main

  • Using the worksheet to help you, set up the equipment safely and record your measurements in an appropriate manner.

  • Collect the second sheet to guide you through the rest of this investigation.

    Warning – take care that the retort stand is set up safely and will not topple over.


T2

  • ‘T2‘ is proportional to ‘l’ because

  • This means that the only two factors that affect the time period of a pendulum are the length and the strength of gravity.

  • The mass and how far is swings back and forth do not affect it since they are not in the equation.

l


Pendulums2
Pendulums

Rearrangethe pendulum equation to analyse their motion

Investigatethe relationship between length and time period

Identifythe factors that affect the frequency of a pendulum


Plenary 1
Plenary - 1

  • As an astronaut who has just landed on another planet, how could you measure the strength of gravity using common items found on a space craft?

    g = l x 4π2 / T2


Plenary 2
Plenary - 2

  • You own a fairground, and want to build a giant swing that is 10m high. To ensure it is safe enough for the thrill seekers you need to know the frequency.

  • How would you calculate this and what would it be?

    0.16 Hz