Question

time for 40 oscillations of pendulum is measured as t1=49.5 seconds t3= 49.5 second .what is the precision of measurement of time​

Answer 1

Answer:

According to the problem time for 20 oscillations of a pendulum

t

1

=39.6s, t

2

=39.9s, t

3

=39.5s

It is quite obvious from these observations that the least count by the water is 0.1s. As measurements have only one decimal place. Precision in measurement = least count of measuring instrument =0.1s

Precision in 20 oscillations =0.1

Therefore, Precision in 1 oscillation =

20

0.1

=0.005.

Answer 2

Explanation:

Least count is defined as the smallest accurate reading which can be measured by any measuring instrument. Least count is defined as pitch divided by measurement number.

Now as per given information from time stamps we see that the least count for time is 0.1 s. Now the precision for the measurement of one oscillation would be equal to

= 0.1 / 40

= 0.0025