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annamal's latest activity
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annamal
replied to the thread
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Why are the accelerations not equal?
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So you think the way I have defined ##\theta## is clockwise b/c we are measuring the angle from the horizontal to the pendulum string...
Apr 14, 2024
A
annamal
replied to the thread
I
Why are the accelerations not equal?
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I think you meant to say ##\vec i## has to be pointing to the right and ##\vec j## has to be pointing up. That is interesting that the...
Apr 12, 2024
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annamal
replied to the thread
I
Why are the accelerations not equal?
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For this ##\dot{\vec n_1}## and ##\dot{\vec n_2}## I have them negated. ##\dot{\vec n_1} = \dot{\theta}\vec k \times \vec n_1 =...
Apr 12, 2024
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annamal
replied to the thread
I
Why are the accelerations not equal?
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$$\vec a = \frac{d(-v sin\theta \vec n_1 + v cos\theta \vec n_2)}{dt} = (-asin\theta - 2v cos\theta \dot{\theta})\vec n_1 +...
Apr 12, 2024
A
annamal
replied to the thread
I
Why are the accelerations not equal?
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I forgot to add the negative sign to ##vsin\theta## but everything else is the same
Apr 12, 2024
A
annamal
replied to the thread
I
Why are the accelerations not equal?
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Above I forgot to add a negative to ##\vec n_1## so ##\vec v = -v \vec i = -v sin\theta \vec n_1 + v cos\theta \vec n_2## not just...
Apr 12, 2024
A
annamal
replied to the thread
I
Why are the accelerations not equal?
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I already included and simplified their derivatives in equation (2)
Apr 11, 2024
A
annamal
replied to the thread
I
Why are the accelerations not equal?
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Yes ##\vec n_2## points along my pendulum rod as it moves and ##\vec n_1## points perpendicular to that constantly.
Apr 11, 2024
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annamal
posted the thread
I
Why are the accelerations not equal?
in
Mechanics
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##\vec n_2## points to the diagonal top left. The velocity v is a function of t. So for example ##2t^2## and a = dv/dt. Putting the...
Apr 11, 2024
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annamal
replied to the thread
A wheel of radius r rolls along a curve
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Ok, so the contact point on the ground is moving? Like the contact point is sliding with respect to the ground?
Apr 2, 2024
A
annamal
replied to the thread
A wheel of radius r rolls along a curve
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I think the problem is not saying that the contact point has an instantaneous velocity of 0 when it says the contact point traverses...
Apr 2, 2024
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annamal
replied to the thread
For a translating block with slipping find the maximum force F
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Resolved, that was my mistake. The distance is d - h/2.
Mar 19, 2024
A
annamal
posted the thread
For a translating block with slipping find the maximum force F
in
Introductory Physics Homework Help
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For this translating block problem, below is the solution. I was wondering why if I took the moment about the center of gravity G, the...
Mar 19, 2024
A
annamal
replied to the thread
A massless disk with an embedded particle rolls down an inclined plane
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What is this "lab" you are referring to?
Mar 16, 2024
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annamal
replied to the thread
A massless disk with an embedded particle rolls down an inclined plane
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ok but how do you explain this mathematically? I thought ##\frac{d\vec r}{dt} = \vec v^{P/C}##. Since ##\vec r^{P/C} = (R/2)*(5 + 4...
Mar 15, 2024
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