Pendulum problem: particularly the wording Rest position.

[hongiddong]

The Attempt at a Solution

It seems as though the rest point is at the ends of the pendulum swing.
I know that the period of a pendulum is the time it takes the pendulum to make one
full back-and-forth swing.
I think this problem is wrong if the rest point means equilibrium point. Because then the Period would be .4 seconds. [/B]

 

[gneill]

The question and explanation are fine. The initial rest point of the pendulum is where the pendulum rested before it was struck by the bullet.

 

[hongiddong]

Thank you GNeill!