Question

Give reasons for the following:

Motion of leaves blowing in the wind is said to be non-periodic.

Answer 1

1. The motion of a wind-blown tree leaf oscillates, yet it is not periodic.
2. Tree leaf oscillates but does not repeats its motion after an equal interval of time.
3. Furthermore, its departure from equilibrium is not a normal function of time.
4. As a result its motion is said to be non-periodic.