TSny's latest activity

Your result ##-\frac 1 2 \lambda v^3## is correct for the rate at which KE is lost to heat at point B. I’m not sure of your thought...

Yes Rigidity imposes a condition on the velocities of two points of the rod, not the accelerations.

I think you are right. The book solution implicitly assumes that the voltage at the bottom of slab 1 is constant across the width, which...

Good. Ok. This is less of an eyesore if you write it as ##U = U_0 -\lambda ghx##, where ##U_0## is the total potential energy at the...

As pointed out by @Steve4Physics, mechanical energy is not conserved. However, you can still solve it using energy concepts. (1) Find...

Yes, they correctly accounted for gravity. But, they did not account for the change in chemical energy ##U_{chem}## of the battery...

Your two methods look correct. I did catch a spot where you have two compensating errors: Check the signs in this calculation...

Yes. Nice analogy.

We're in the same neck of the woods as where there's an apparent paradox with the energy before and after a charged capacitor is...

A number of teachers have been interested in collecting the black and white films that were part of the PSSC program in the 1960s. Many...

Good. If you wish, you can post your work for ##\nabla \mu## and we can review it.

If you release the block from rest at the position where it starts to submerge, then the only two forces doing work as the block...

Is this taken directly from your teacher's PowerPoint slides? Does it represent your teacher's solution to the problem of post #1? Are...

This problem is not the same as the one given in your first post. It appears to be totally unrelated. You mention your teacher's...

Besides the error pointed out by @anuttarasammyak, check your work for the following: I get an additional term proportional to...