Question

23) A pendulum of 28cm long oscillates through an
angle 18º. The length of path described by its
extremity is
A4.4 cm
B) 4.4 cm
C) 8.4 m
DI 8.8 cm​

Answer 1

Answer:

Here, pendulum performs circular arc motion

Also, radius =18cm

Angle (θ)=18∘

=(π/180×18)c

∴θ=10πc/10

∴ length of path =rθ

∴ length of path =18×π/10cm

∴ length of path =18π/10cm=4.39822971503cm

∴ length of path travelled is 4.39822971503cm

so the answer will be 4.4 cm