A conical pendulum has string length 1.25 m and cosθ=0.8. Take g=π² m/s². If the square of its time period is N s², find N.

Question

G1 Physics · Accepted Answer

For a conical pendulum, τ = 2π√(l cosθ/g). Here l cosθ = 1.25×0.8 = 1 m. Thus τ = 2π√(1/π²) = 2 s. Therefore τ² = 4 s², so N=4.