As shown in the figure, the ball is released from rest at the left end. In the process of swinging from left to right, regardless of air resistance, then () A. In the process of moving from the highest point to the lowest point, part of the gravitational potential energy is converted into kinetic energy B. in the process of moving from the lowest point to the highest point, part of the kinetic energy is converted into gravitational potential energy C. the height of the highest point on the left is greater than that of the highest point on the right D. the height of the highest point on the left is equal to that of the highest point on the right

As shown in the figure, the ball is released from rest at the left end. In the process of swinging from left to right, regardless of air resistance, then () A. In the process of moving from the highest point to the lowest point, part of the gravitational potential energy is converted into kinetic energy B. in the process of moving from the lowest point to the highest point, part of the kinetic energy is converted into gravitational potential energy C. the height of the highest point on the left is greater than that of the highest point on the right D. the height of the highest point on the left is equal to that of the highest point on the right

A. The gravitational potential energy of the ball in the figure refers to the process of the ball moving from the highest point to the lowest point. The mass of the ball is unchanged, and the height drops to the lowest point. For the lowest point, the height is 0, the gravitational potential energy is 0, the velocity reaches the maximum, and the kinetic energy is the maximum. Therefore, the reduced gravitational potential energy is converted into kinetic energy when the air resistance is not considered, that is, the When the ball reaches the lowest point, the gravitational potential energy is all converted into kinetic energy, so a is wrong. B. when the ball moves from the lowest point to the highest point, the mass remains the same, the height rises to the highest point, and the velocity becomes 0, so the gravitational potential energy is the largest and the kinetic energy is the smallest, so when the air resistance is ignored, the kinetic energy is all converted into gravitational potential energy; so B is wrong. C, D and the ball are not empty in the swing process If the velocity of the highest points on both sides is 0, that is, if the kinetic energy is 0, then the gravitational potential energy is the same, so the heights of the highest points on both sides are equal, so C is wrong and D is correct. Therefore, D is selected