Why does the wedge reach maximum velocity at height h?

[gracy]

Because as long force is there ,acceleration will also be there and so velocity will go on increasing and there will not be any instant when we can say that it is maximum velocity that's why when there is no horizontal force no acceleration as well as deceleration ,at that moment velocity will be maximum and that is certainly the midpoint of depression.Right?

Is this correct?

 

[gracy]

If the block is not at the middle of the depression then the speed of the wedge is changing.

But it must be having some instantaneous velocity just before coming to mid point of depression.

 

[haruspex]

But it must be having some instantaneous velocity just before coming to mid point of depression.

Yes... so?

 

[gracy]

But it must be having some instantaneous velocity just before coming to mid point of depression.

But it must be having some instantaneous velocity just before the block comes to mid point of depression.[/QUOTE]By it I mean wedge.

 

[haruspex]

But it must be having some instantaneous velocity just before the block comes to mid point of depression.

By it I mean wedge.[/QUOTE]
I agreed the wedge would have some instantaneous velocity before the block reaches the mid point. But it will not be quite as much as when the block is at the mid point.

 

[gracy]

But it will not be quite as much as when the block is at the mid point.

Why?

 

[haruspex]

Why?

Because as long as the block is not exactly at the mid point the normal force will have a horizontal component, accelerating the wedge.

 

[gracy]

Because as long as the block is not exactly at the mid point the normal force will have a horizontal component, accelerating the wedge.

That's why I have used the term just before coming at mid point.So that there will not be any horizontal force after that.

 

[haruspex]

It

That's why I have used the term just before coming at mid point.So that there will not be any horizontal force after that.

It's either at the mid point or it isn't. If it's not at the midpoint then there is a horizontal force, no matter how small.