# Questions tagged [work]

The product of the force on an object and the displacement the object undergoes along the direction of the force.

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### Is the given force conservative? [closed]

I've attached an image in which a question can be seen. I've successfully solved the problem and the answer is zero. However, I seek if the given force is conservative or non-conservative. I think it ...
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### Does doing work on system increase or decrease its internal energy?

I am currently reading about the 1st law of thermodynamics, from the book "A Hot Story" by G. Venkataraman. While discussing the law, the author tells that when we do work on the system, its ...
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### Is work done by a charged particle not gauge invariant?

Work done by a charged point particle with charge $q$ in an external electric field derived from a scalar potential $\phi$ is given by $$W=q \phi.$$ Even if we add a magnetic field the definition ...
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### Why does my potential energy decrease when lifting a book?

I was reading morin's intro to mechanics book, and i reached the point where he was discussing work potential energy equivalence, which i find very confusing right now... basically we are analysing me ...
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### Static friction, no work

Imagine a ball rolling without slipping on the floor. Then the force of static friction has non-zero torque, so why it doesn't change the overall energy of the ball?
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1 vote
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### Physical meaning of negative work

I have a simple question here. I've been learning quite a bit about electrodynamics and solving some problems. However, I'm stumbling on a problem: I always get the correct expression of work but have ...
1 vote
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### Piston cylinder question [duplicate]

I have a simple question, but it confuses me a lot. Suppose we have a piston-cylinder device that is being heated, say, at the rate of Q_dot. All other faces can be assumed to be adiabatic. The ...
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### Where will be the equilibrium position for the piston?

A piston can slide without friction inside a horizontal cylindrical vessel, which contains an ideal mono-atomic gas. The piston and the inner surface of the cylinder are coated with a thin layer of a ...
### Why $VdP$ term omitted in isothermal Work?
Context: I'm asking about classical thermodynamics, that is "ideal gas", closed system, reversible processes etc. Why is the $VdP$ term omitted in calculation of work during isothermal ...