# Tagged Questions

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 this thought regarding work and potential energy correct?

I am really confused about this. The potential energy acquired by an object is equal to $mgh$, if we are on any planet, where $g$ is the planet's gravitational acceleration, which directly comes from ...
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### I dropped my tissue box on a glass table, the box didn't bounce back, table didn't move nor break, what happened?

I have a box, it drops and thus by moving has Kinetic energy, It doesn't penetrate and impacts however the box doesn't rebound nor breaks the table. Its like when I slam my fist on a table but the ...
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### Pressure Volume graphs and work done

So if I have a system where pressure, volume, and temperature change, how do I find the work done on the system? I look at an example where you simply use $\mathrm{d}W =-p\, \mathrm{d}V$, but I ...
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### Concept of Work & Energy with trolley Example

I was solving one question in which girl on trolley of certain masses sits. Then certain force is applied on trolley which made some displacement. In my opinion work should be done by both Girl & ...
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### confusion regarding force applied at different angles and work thus done? [closed]

considering $f=1$ and $s=1$ in the work-energy theorem , $W= \cos(\omega)$ this shows that as we increase the angle we do less work for moving an object to the same distance. It also means that ...
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### Does towing a car make moving it easier?

once i saw a diagram in some of my books , of a car being towed by a big vehicle that was sort of a truck. now today that i am studying work , that picture somehow popped in my mind. it looked mostly ...
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### Why aren't two systems considered as one instead of saying we are doing no work on one of them?

Suppose i have on my head a block that is applying its force (weight) perpendicularly on my head. now suddenly i start moving with the block still on my head. According to the definition of work , I ...
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### Change of energy into friction?

If I am pushing a car and it does not move, I am doing no mechanical work. However, I am changing the energy that was stored in my cells into heat energy (maybe sound energy if my hand slips off the ...
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### Conventions and realities of kinetic energy?

I am having doubts regarding why $1/2$ is present in kinetic energy and if this is conventional why cant we say potential energy is $2mgh$ and kinetic energy $mv^2$. So is this $1/2$ conventional or ...
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### Why is work a scalar quantity?

If the displacement is in the direction of the force, then work is positive. If the displacement is in the opposite direction of the force, then work is negative. If the displacement is perpendicular ...
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### Area of a Trapezoid formula doesn't seem to work? (In calculating work)

My Physics Teacher assigned me to find the work done by the force described by the above graph. Work is the integral of the force with respect to distance, or in other words, the area under the graph. ...
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### I'm learning Work-energy theorem, this question popped into my mind about Force applied and displacement [closed]

I know a lot but I'm not sure, I'm guessing if 400 J of work done on a 800 Newton object, if I'm correct, 400 N to 800 N... that is 0.5 m displacement, so by $W = \Delta \ KE$ why do I get 200 J? I ...
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### The relation between work and time

Work equals the force acting on an object times the distance that object moves. But I am a bit confused about the definition of the distance. is it the distance the object moves under the effect of ...
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### Confusion regarding the sign of the work of a force

The work of a force is given by the following line integral: $$W=\int_{A}^{B}\vec{F}\cdot \vec{dl}$$ So the work that is needed for an electric particle to be moved in an ...