According to the force analysis of the ball, the ball is subjected to gravity, supporting force and pulling force. Because the direction of the supporting force is constant, according to the stretching method, the pulling force of the rope gradually decreases and the supporting force gradually increases.

According to Newton's third law, the pressure on the inclined plane increases gradually. For the inclined plane, according to the equilibrium condition, the size of f is equal to the horizontal component of the pressure of the ball on the inclined plane, so f increases;

F work is equal to the sum of the mechanical energy increment of the ball and the kinetic energy increment of the inclined plane, w = mgl (1-sinθ)+12mv2+12m? Vanadium dioxide

Alternative data: w = 0.337j j.

So the answer is: increase; 0.337.