Final answer:
The kinetic energy of the ball at the highest point of its motion is zero, but it still has potential energy due to its height.
Step-by-step explanation:
To find the kinetic energy of the ball at the highest point of its motion, we need to consider its potential energy at the highest point. At the highest point, the ball's vertical velocity is zero, and therefore its kinetic energy is also zero. However, the ball still has potential energy due to its height above the ground.
The potential energy of an object near the surface of the Earth is given by the equation PE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height above the reference point.
In this case, the potential energy of the ball at the highest point is given by PE = (2.07 kg) * (9.8 m/s^2) * h, where h is the maximum height the ball reaches.