Question

A pendulum is timed, first for 20 swings and then for 50 swings

time for 20 swings=17.4s
time for 50 swings=43.2s

Calculate the average time per swing in each case. The answers are slightly different. suggest some possible reason for this?

Answer 1

Explanation:

A pendulum is timed, first for 20 swings and then for 50 swings: Time for 20 swings= 17.4s. Time for 50 swings=43.2s. Calculate the average time per swing in each case. The answer is slightly different

Answer 2

Answer:

Explanation:

Case I:Average time per swing=17.420                                           =0.87 sCase II:Average time per swing=43.250                                           =0.864 sIn the second case, the average time is more accurate when compared tothe first case because of more number of observations.