91影视

The given data can be listed below as

• A pendulum is referred to as a weight that is hung from a fixed end for swinging freely.

• A constant force is applied to trigger the pendulum鈥檚 motion, which leads to imbalances in the equilibrium position of the pendulum.

• The swing time of the pendulum is the time taken by the pendulum to reach its starting destination after a whole swing.

• The pendulum swings at a period of $2\mathrm{s}$.

As the total period of the pendulum is $2\mathrm{s}$, the time$0.01\mathrm{s}$ will not be a reasonable choice for as this time is almost negligible for understanding the pendulum鈥檚 motion.

The other periods such as (a)$1\mathrm{s}$, (b)$0.01\mathrm{s}$and (c)$0.05\mathrm{s}$ can predict the time as the time is independent of the pendulum鈥檚 mass, plus these are not negligible. However, there are no devices that can predict the motion of a pendulum in this small amount of time, such as $0.01\mathrm{s}$.

Thus, d)$0.01\mathrm{s}$ is not a reasonable choice for $鈭�\mathrm{t}$.