Question

The length of a second's pendulum at a place where g = 9.8m/s ${}^2$ is 90.2 cm. State whether true or false.

• A. True
• B. False

Answer 1

The correct option is B False

Time period of pendulum is:

$T=2\pi \sqrt[]{\frac{l}{g}}$

$l=\frac{T^{2}g}{4{\pi }^2}$

$l=\frac{4\times 9.8}{4\times {\pi }^2}$

$l=0.993m=99.3m$

$l$= length of pendulum

$g$= $9.8m/s$

$T$ = Time period of seconds pendulum $=2s$

So, our given statement is false.