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 answer is slightly different. suggest some possible reason for this?

Answer 1

Explanation:

First case:                                Second case:

20 swings = 17.4s                    50 swings = 43.2s                                                                                                          

1 swing = 0.87s                        1 swing = 0.864s