haruspex's latest activity

The apparent height of the whole block is the sum of the apparent height of the submerged portion and the apparent height of the exposed...

Thanks for the clarification.

I've stayed out of this thread because I have trouble deciphering the meaning of some parts… whom? their? I have no idea what is...

I still fail to see how it could appear to be less than the true height when viewed from the denser medium.

Wouldn’t that make the height seem greater?

First, choose your axes. You don't have to have x as horizontal and y as vertical. Sometimes it makes the algebra easier if you...

My approach was: When the cart has moved s from the cannon, how much water has the cannon ejected? How much of that has reached the...

Then you drew the triangle representing the valve the wrong way up.

I do not understand the function of the check valve here. It is drawn as though allowing flow upwards, which means admitting air if the...

In your fifth equation, the one ending …16-1)=0, check where that -1 comes from. It should be something else. Also, having obtained a...

I repeat: And your working, of course.

No. You have confused yourself by drawing the forces on the wedge and the block in the same diagram. Draw two separate FBDs.

The simplest way to think of it is to include the portion of the rope in contact with the pulley as being part of the wedge+pulley...

Really?

What has the spring to do with it? When the system is released from rest, is the spring relaxed, at equilibrium with its suspended...