Applying Newton's Laws, motion with constant acceleration

[Mert Kerem Yavuz]

Homework Statement

Homework Equations

F=m*a
ΣF=0

The Attempt at a Solution

Firstly, I tried to work on the normal force of bowling ball. But I can't get the answer. I don't get the idea that bowling ball could be kept at constant height, I didn't really understand the question guess. Can anybody explain it to me step by step?

 

[Jonathan Scott]

If the wedge is pushed towards the ball with just the right acceleration, the net force between the ball and the wedge will be normal to the wedge and the ball will remain at a fixed height on the wedge (but the whole system will accelerate for as long as the force can be maintained). The horizontal force will be that needed to accelerate the combined system of the wedge and the ball with the necessary acceleration.

 

[drvrm]

Firstly, I tried to work on the normal force of bowling ball. But I can't get the answer. I don't get the idea that bowling ball could be kept at constant height, I didn't really understand the question guess. Can anybody explain it to me step by step?

pl. show the force diagram on the ball as well as the wedge ...then one can visualize the motion.