wrobel's latest activity

I get it. That’s not really my area — I mostly just solve problems. But this forum has experts on the otherworldly essence of...

One just need to understand how the very concept of the moment of inertia arises. Assume a rigid body rotates about a fixed point that...

Just found a really good lecture on tensors. It starts with the absolute basics and goes all the way up to universal mapping:

Suppose two particles of masses ##m_1## and ##m_2## moving along a line collide perfectly elastically. By definition, this means that if...

Two unknowns: the force ##P## and system acceleration ##a## and two equations: projections of Newton's second law onto the horizontal...

Basically, a good problem can be made out of this. We just need to define the law of motion along the meridian. A person walking along...

I do not know what you understand by 'meaning'. You started by objecting to my phrase 'A definition is a definition.' Perhaps you see in...

So it's all the same thing. Until you write a formula that connects kinetic energy with some other quantity, the formula ##T=mv^2/2##...

Explain this to me with an example. In #15, I wrote down a formula derived from Newton's second law. This formula is useful for solving...

That seemed like an objection, but I didn't quite catch it. Could you please clarify your point?

Most pointless debates arise precisely from searching for a 'meaning behind it'. In fact, there are definitions and theorems that...

There’s a great concept called 'definition.' A definition is a definition. The definition of work done is...

There is nothing strange about this. For example, gravity also tries to pull a simple pendulum off its circular path, but that doesn't...

Nice bait. I have a feeling the OP won't show up again.

I just looked at this. We have a force of magnitude ##F_1## applied to the left (backwards). This, through the gearing mechanism, also...