The Mean Position is the Position that is moderate between two other extreme positions. It is the Position of the Bob when the freely suspended Pendulum is at rest. ... Also velocity (v) is zero at extreme position, thus T is minimum at extreme position.

Which energy is present at the mean position of the pendulum?

At its highest point (Point A) the pendulum is momentarily motionless. All of the energy in the pendulum is gravitational potential energy and there is no kinetic energy.

What is acceleration of pendulum at mean position?

When the bob is at the mean position O, the angle α=0, therefore sinα=0; hence, the tangential acceleration is zero.