a body moves with constant speed. which of the following statements is true? group of answer choices the net work done on the body is positive, and the kinetic energy is increasing. the net work done on the body is zero, and the kinetic energy is constant. the net work done on the body is zero, and the kinetic energy is decreasing. the net work done on the body is zero, and the kinetic energy is increasing. the net work done on the body is negative, and the kinetic energy is decreasing.