January 6 Physics. In: How would the period of a pendulum on earth differ from that on the moon?

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Presentation transcript:

January 6 Physics

In: How would the period of a pendulum on earth differ from that on the moon?

Objective: To understand the variables in the motion of a pendulum. Success criteria: Be able to calculate the period of a pendulum.

Equilibrium is an objects natural resting position Amplitude is the maximum distance from equilibrium

Period is the amount of time it takes to complete one full cycle Frequency is how many times it passes a certain point

Frequency is how many times it completes a cycle

Discovery lab: Period of a pendulum What variables affect the period of a pendulum? As a group, decide what variables to test. Test each separately Keep track of your data

What variables affected the period of the pendulum?

Pendulum: T=2πl/g l=length of pendulum g=acceleration due to gravity: 9.8 m/s 2

A clock has a pendulum with a length of.5 meters. What is the period of the pendulum?

Take the length of the pendulum in your lab, and calculate the period. How does it compare to the measured value?

How long a pendulum do you need to make a clock goes tick-tock every second?

Tarzan was swinging on a 15 meter vine across a ravine. He missed the other side and swung back to the original side. How long did it take to swing forward and back? If he keeps going back and forth, how many times each second will he swing back and forth?

A race walkers legs are 1.4 meters long. What is the natural period of her legs? What is the frequency of her stride?

A runners lower leg has a length of.7 meters. His whole leg has a length of 1.2 meters. What is the period of his legs if he bends his knees when he runs? What is the period if he doesnt?

Out: Why do sprinters lift their knees when they run?