# the simple pendulum has a period of 2 seconds taking g=9.8ms-2. Calculate the length of the pendulum

Arun
25763 Points
2 years ago

Use T = 2π √( l / g )

Plug in the values, (you can square both sides for easier calculations & eliminating the square root though)

$4 = 4 \Pi^{2} \frac{L}{g}$

$L = 9.8 / 9.8596 = 0.9939$

Hope this helps!