Pendulum- Maximum displacement?

[yourmom98]

what is the maximum displacement of a pendulum i dont know what it is. is it the distance from the central point to the end of the arm? and how do i solve it if i am given a periodic Sin function?

 

[HallsofIvy]

The "maximum displacement" is usually the distance, measured along the arc, from the lowest point of the pendulum to the highest. If you are given a function of the form s= A sin(ωt), then the displacement is the amplitude, A.