Question

The bob of a simple pendulum is pulled to the right by an angle θ_0 = 10° and then released from rest. If the period of oscillation equals to one second, what is the time needed for the bob to reach the angular position θ = -5° for the first time? (g = 10 m/s^2)

Answer 1

$T=0.5(1+0.5)T_0=0.75~s.$