Question

A pendulum swings through an angle of 30° and describes an arc 8.8cm in length.Find the length of the pendulum

Answer 1

Step-by-step explanation:

A pendulum swings through an angle of 30° and describes an arc 8.8cm in length.Find the length of the pendulum answer

Answer 2

Length of the arc,

l = $\large\sf{ \frac{\theta}{360} \times 2\pi \: r}$

$\therefore$ Length of the pendulum, r =

$\large\sf{\frac{360 \: l}{2 \theta \pi} = \frac{360 \times 8.8 \times 7}{2 \times 22 \times 30} = 16.8cm}$