Question

If the value of time for 20 oscillation obtained were 16.1s,15.9s,16.0s,16.2s, and 15.8s, calculate the period of pendulum.

Answer 1

Let's first find the average time for 20 oscillations:

$t_{avg}=\dfrac{16.1\ s+15.9\ s+16.0\ s+16.2\ s+15.8\ s}{5}$

=16 s.

Finally, we can find the period of the pendulum:

$T=\dfrac{t_{avg}}{20}=\dfrac{16\ s}{20}=0.8\ s.$