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Physical Pendulum

The period of...

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The period of oscillation of a simple pendulum isT = 2l/g.L is about 15cm and is known to 1mm accuracy . The period of oscillation is about 1s. The time of100 oscillation is measured with a watch of 0.1s resolution. What is the accuracy indetermination of g?

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The period of oscillation of a simple pendulum is $T = 2 π \sqrt{\frac{L}{g}}$ . Measure of $L$ is $20.0 c m$ known to $1 m m$ accuracy and time for $100$ oscillations of the pendulum is found to be $90 s$ using a wrist watch of $1 s$ resolution. The accuracy in the determination of $g$ ?

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