Question

Find the change in length of a second’s pendulum, if the acceleration due to gravity at the place changes from 9.75 m/s² to 9.80 m/s².

Answer 1

Data : g₁ = 9.75 m/s² , g₂ = 9.8 m/s² 

Length of a seconds pendulum, L = \(\cfrac{g}{\pi^2}\)

∴ The length of the seconds pendulum must be increased from 0.9876 m to 0.9927 m, i.e., by 0.0051 m.