As shown in the picture, the appearance of the New Century Mingdu Hotel, which is located on the bank of the canal, is a landmark building in our county with a total height of about 1 m. Xiaoming take

As shown in the picture, the appearance of the New Century Mingdu Hotel, which is located on the bank of the canal, is a landmark building in our county with a total height of about 1 m. Xiaoming takes the hotel. (1) The object studied is Xiao Ming, and the elevator is taken as the reference object. There is no change in position between Xiao Ming and the elevator, so Xiao Ming is still.

(2) When Xiao Ming takes the elevator in the hotel to rise at a constant speed, the elevator does work for Xiao Ming;

(3) When Xiao Ming rises in the elevator at a constant speed, his mass, speed and kinetic energy remain unchanged.

(4) When Xiao Ming rises, his mass remains unchanged, his height increases and his gravitational potential energy increases.

So the answer is: static; Do; Constant; Increase.