We know that at each extreme position, the
instantaneous velocity of th^bob is zero. If the string is cut at the extreme position, it is under the action of ‘g only, hence, the bob will fall vertically downwards.
(b) When the bob is at the mean position, it is affected by gravity. At mean position of the bob is having velocity of 1 m along the tangent to the arc which is in the horizontal direction. If the string is cut at the mean position, the bob will behave as a horizontal projectile. Hence, it will follow a parabolic path.