what is the period of a pendulum if the length of the rope is 1.5 m?​

Answer 1

So would it be:
T=2pisqrt(L/g)
T=2pisqrt(1.5 m/9.8 N/kg)
T=2.46 s
Is this correct

Answer 2

Yes, 2.45567...

Answer 3

What is the gravitational force between the two objects, the smaller object has a mass of 0.25kg and the larger object is 0.55m apart?