Question $10$:

A pendulum hangs from the ceiling of a stationary elevator, and swings through small oscillations with a period of $2\mathrm{.}0$ seconds. If the elevator accelerates upward at $\backslash (1\mathrm{.}5\backslash$mathrm$\{$~m$\}/\backslash$mathrm$\{$s$\}^\{2\}\backslash ),$ what will be the period of small oscillations of the pendulum?

A$)1\mathrm{.}9$ s

B$)1\mathrm{.}7$ s

C$)2\mathrm{.}1$ s

D$)2\mathrm{.}3$ s