Question

a pendulum swings hrough an angle 30 degree and describe an arc 17.6 cm in length. find the length of pendulum

Answer 1

Given that,

x* = 30*

length of arc = 17.6 cm

We know,

x* / 360* × 2πr = 17.6 cm

30* / 360* × 2 × 22/7 × r = 17.6 cm

r = 17.6cm × 7/22 × 1/2 × 6/1

r = 16.8cm

Therefore, length of pendulum is 16.8cm