Throw up the ball and draw a conclusion about the change in its speed.

When the ball rises up, its speed decreases, at the top of the trajectory, its speed is zero, then when the ball falls, its speed increases, and at the moment it hits the ground it is maximum.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.