A simple pendulum 2 m long swings through a maximum angle of 30? with the vertical.

The complete question was calculate the period T assuming the smallest amplitude.

Using the equation;

T = 2 π√ (L/g)

Where T is the period in seconds, L is the length of the rod or wire in meters and g is the acceleration due to gravity.

Hence; T = 2*3.14 * √ (2/9.81)

= 6.28 * 0.4515

= 2.836 seconds