Question

a pendulem completes 4 oscillation in 9 secs . Calculate the length of the pendulum if g = 10 m/s² ​

Answer 1

Answer:

1.28m (approx.)

Step-by-step explanation:

4 oscillations in 9 seconds. Therefore, Time Period (T) = 9/4 seconds.

Given, g = 10 m/s²

T = 2π√(L/g)

9/4 = 2 × (22/7) × √(L/10)

(9/4) ÷ (44/7) = √(L/10)

((9×7)/(4×44))² = L/10

(63/176)² × 10 = L

L = 30969/30976

L ≈ 1.28m