Question

6. A pendulum completes 2 oscillations in 5 s.
(a) What is its time period ? (b) If g = 9.8 m s?, find
its length​

Answer 1

Explanation:

time period ,T = 2π √(L/g)

for one oscillation = 2.5s

2.5 ² = 4π² x L/9.8

L =( 9.8 x 2.5²) / 4 π² m