Imagine that you are swinging back and forth a chain with a locket on the end. Assuming that you are on Earth so that gravity is constant at 9.81 meters/second², and you know that the chain is 43 centimeters long, what is the period of this simple pendulum?

13 seconds

1.3 seconds

3.5 seconds

0.76 seconds

Question

Imagine that you are swinging back and forth a chain with a locket on the end. Assuming that you are on Earth so that gravity is constant at 9.81 meters/second², and you know that the chain is 43 centimeters long, what is the period of this simple pendulum?



13 seconds



1.3 seconds 



3.5 seconds



0.76 seconds

mrnood · Answer

The period of a simple pendulum is given by the equation
$$T=2\pi \sqrt{\frac{ l }{ g }}$$

You know l and g from the question

Work out T from the equation

mrnood · Answer

Be CAREFUL with the units