Respuesta :

MathPhys

Answer:

2.3 m

Explanation:

A simple pendulum has a period of:

T = 2π √(L/g)

If T = 3 seconds and g = 9.9 m/s², then L is:

3 = 2π √(L/9.9)

3/(2π) = √(L/9.9)

(3/(2π))² = L / 9.9

L = 9.9 (3/(2π))²

L ≈ 2.3 m