When an object moves in the air along the vertical direction, and only under the action of gravity and air resistance, the motion of the object will be stable( When an object moves in the air along the vertical direction, and only under the action of gravity and air resistance, the () a potential energy, B kinetic energy, C mechanical energy and d mechanical energy of the object may not be changed

When an object moves in the air along the vertical direction, and only under the action of gravity and air resistance, the motion of the object will be stable( When an object moves in the air along the vertical direction, and only under the action of gravity and air resistance, the () a potential energy, B kinetic energy, C mechanical energy and d mechanical energy of the object may not be changed

D