The weight of the ball at the very top of its motion is the same as its weight anywhere else.

Here's why:

* Weight is a force due to gravity: Weight is calculated by multiplying the ball's mass by the acceleration due to gravity (approximately 9.8 m/s²).

* Gravity acts constantly: Even though the ball momentarily stops at the top of its trajectory, gravity is still acting on it.

* No change in mass: The ball's mass doesn't change, so its weight remains constant.

Important Note: While the ball's weight remains constant, its apparent weight (how heavy it feels) is zero at the very top. This is because there is no normal force acting on the ball at that instant.