Suppose a ping pong ball is tossed. When the ball reaches the highest point, which statement about the ball’s velocity and acceleration is true?

At the highest point of its trajectory, the ping pong ball's velocity is not zero, it is at its minimum horizontal value. The velocity is the speed of the ball in a given direction, so at the top of the arc, the ball is still moving horizontally, hence it has velocity.

The acceleration of the ball is not zero at the highest point. This is due to gravity, which constantly pulls the ball downwards. Even at the peak, when the ball is momentarily stationary in the vertical direction, it is accelerating downwards at about 9.8 m/s² (on Earth). This is why the ball starts to descend after reaching the peak.

So, the statement that is true at the highest point is: "The ball's velocity is at its minimum horizontal value and it is accelerating downwards due to gravity."