All Questions
Tagged with classical-mechanics work
211
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Taylor Example 4.8. Is my reasoning sound? [closed]
This problem has been giving me all sorts of fits. For one, Taylor states that because the frictional force and normal force are forces of constraint, they produce no work. I'm trying to figure out ...
4
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1
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Is work done by the internal forces independent of the frame of reference?
This question is about work done being dependent on the frame of reference, which is, obviously the net work done.
I ask what is the reason for the work done by internal forces to be independent of ...
- 362
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Is impulse functionally equivalent to work and therefore expressible in Joules?
I am trying to understand things at at a fundamental and conceptual level.
Givens...
1 kg mass
Mass is at rest (relatively, of course)
Mass is on an idealized frictionless surface
1 N of force is ...
- 161
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2
answers
772
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How does the work-energy theorem relate to the first law of thermodynamics?
The work energy theorem states that the net work on a particle is equal to the change in the kinetic energy of the particle:
$$W_{net}=\Delta K $$
My first question is whether this formula (the work-...
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Why the weight vector is perpendicular to the displacement of the object being moved by the tension force in the conical pendulum?
Can someone explain why, in the conical pendulum, the weight vector is perpendicular to the displacement of the object being moved by the tension force in the system? I understand that the tension ...
user282164
1
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2
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97
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Conservative Force in a loop
Could someone prove mathematically that why in this situation a charge could move in a loop with net work done.
Could someone explain this paragraph to me.
user286173
1
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1
answer
35
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If a cylinder skids what can we say about the work of friction on it
A cylinder skids on a rough horizontal plane and we know that a frictional force will act on it.
What can we say about the work done by friction?
I believe that the frictional force is forward, the ...
- 1,260
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36
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Work and mechanical energy relationship for a rigid body
For a single particle in a conservative field, I know that the work done by an external non conservative force $W_n=\Delta M$ where $\Delta M$ is the total mechanical energy.
Is the same true for an ...
- 1,260
3
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3
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Where does a torque-invoking force belong in work energy theorem?
First of all, sorry for the poorly phrased question, simply couldn't figure out a better way to put it.
So, the work energy theorem states that work done on an object is equal to the change in its ...
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Is work done by the normal reaction force when an object is dropped on the ground?
When a perfectly non elastic object (let's say a book) is dropped on the ground, it's kinetic energy from the fall is transformed into heat and sound.
Now, if W = Fs, the work done by the normal ...
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How is work equal to $Tds$ for an element of string in a transverse wave?
Assume that an infinitesimal element of a string is horizontal, and due to a wave passing on it, it's shape changes and is inclined as shown in the figure.
Assuming constant tension $T$ it's claimed ...
- 1,260
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790
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Why does an exact differential mean a force is conservative?
If you can express an integrand as an expression of just one variable i.e. $xdy + ydx = d(xy) = df$ then why does that mean that a loop integral on that will equal 0? Is it because if it is just a ...
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Equation for Work required to achieve a certain velocity [closed]
If we are trying to find the work required to get an object moving at velocity $v$, and we start with $w = f\cdot d$, we can then make the following substitutions:
substitute $f$ with ma: $w = m\cdot ...
20
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Conditions for a force to be conservative
Taylor's classical mechanics ,chapter 4, states:
A force is conservative,if and only if it satisfies two conditions:
$\vec{F}$ is a function of only the position. i.e $\vec{F}=\vec{F}(\vec{r})$.
The ...
- 1,295
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Variable Exchange $F(t) \to F(x)$? I want the value of the work done by drag [closed]
I got a nonlinear equation, which describes the magnitude of a force as a function of time, but I don't know how to calculate the work done by the force. Given:
$$F(t) = kv(t)$$
with
$$v(t)= \left(1-\...
