# 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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### Neutral points in an electrical circuit?

I have been told that potential in an electric circuit is defined as the work done in bringing a unit test positive charge to that point inside the circuit. Thus it satisfies the premise that ...
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### Multiple spring-block system. Question about method of solving [closed]

I dont know if these kind of questions are allowed so, sorry if i shouldnt be asking homework questions... This is how I attempted the question. Let the tension in the right upper string be T. Then ...
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### Moving boundary work

Moving boundary work can be equated from $\Delta W = p dV$. So can we say that W is a function of V and p is the first derivative of W, f'(v)?
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### Work-energy principle: What if there is no change in KE, but change in PE?

So I've been taught that the work-energy principle says that the total work done on an object is always equal to the change in kinetic energy of an object. Now let's say that I have a car moving up an ...
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### Does fuel consumption depend completely on work done?

I recently encountered a question in a physics workbook, a car of mass m kg is lifted by two cranes to a height of h metres, the cranes lift the car in t1 and t2 seconds respectively (t1<t2), then ...
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### How is centrifugal force doing work here?

Q) A plane spiral made of stiff smooth wire is rotated with a constant angular velocity $\omega$ in a horizontal plane about the fixed vertical axis O. A small sleeve M slides along that spiral ...
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### How does work done to move an object scale with more/less gravity?

First let me say that Physics is not my area of expertise and my knowledge from school is pretty rusty, so I apologize in advance if I am asking a totally stupid thing or I have a mismatched ...
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### Trouble in understanding question related to the work, energy and power chapter about pendulum

Two pendulums of masses $m_1$ and $m_2$ ($m_1>m_2$) and strings of same length are taken. The densities of the both the bobs are the same ($d_1=d_2$), if we compare the time period of the two ...
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### Is the work done by a spring and the work done on a spring the same?

Lets imagine we have a spring of a linear characteristic such that the force the spring exerts is proportional to its deformation $\delta$. The spring is attached horizontally to a wall, now if we ...
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### How can we choose any level for gravitational potential energy to be zero?

In my book, I read that we can choose any level as Zero Gravitational P.E. and measure height of objects above it and call its energy 'mgh'. But by saying that all the points on that level is of zero ...
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### If both forces are equal and they are opposite in direction how can an object be displaced?

In order to calculate work done against force of gravity we consider we have to apply a force of $F=mg$ on a object and we have to do work $W=mgh$. If gravitational force is also $mg$ how can an ...
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### Work done in an Adiabatic process

I was reading this chapter, and am confused with the concept provided under heading WORK (on page 162). The term "adiabatic" as I understand it, involves,absolutely no exchange of energy ...
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### Inconsistency in applying work-energy theorem in the classical problem of a kink on an inclined wedge

Consider the typical problems of mechanics where we had to find the velocity for some mass which reaches bottom of a wedge after metting some changes in the wedge angles (kinks). The following is a ...
What I Know: $$\vec F = -k \vec x$$ where the negative sign indicates the Force acts in the opposite direction to the displacement. If we were to take the integral so... \int_{x_i}^{x_f} Fdx = -\...