All Questions
Tagged with torque rotational-kinematics
62
questions
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47
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When a wheel begins to roll on a flat surface, is it due to fulcrum generated at the contact point by friction?
[Edit: What I'm trying to understand is how any wheel rolls on a surface, instead of just spinning in place. I know that friction provides the force to make the wheel roll, but I'm unsure about the ...
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6
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Should the rotary vane damper torque be less than the load torque?
The rated torque of a rotary vane damper should be less than or more than the load torque?
In my opinion, if the rated torque is greater than the load torque of the damper, then I believe my ...
- 11
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vote
2
answers
104
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Normal reaction exerted by a rolling object
If we take a disc of mass M and radius R and assume that the disc is performing Combined rotational and translational motion on a frictionless flat surface. then if we take a point at the top of the ...
- 25
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2
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72
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Confusion about torque [duplicate]
Consider a free body, not hinged about any point. If a force is applied to one end of the body, the body has a net nonzero torque about many points in space. About which will it rotate? Am I wrong in ...
- 428
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22
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Why does the period of precession of a gyroscope have to be way larger than it's spin period so that it's motion can be modelled?
Mathematically, torque induced gyroscopic precession may be modelled with the following equation:
$$
{\displaystyle T_{\mathrm {p} }={\frac {4\pi ^{2}I_{\mathrm {s} }}{\ mgrT_{\mathrm {s} }}}={\frac {...
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3
answers
88
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Is it possible for a single torque to rotate a sphere of uniform density at rest from one arbitrary orientation to another?
If I had an object at rest in some arbitrary rotational position, is it possible to apply a single force to it in order to rotate it to a second rotational position? This would be assuming the object ...
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3
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143
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In case of an axis where moment of inertia changes with time which of the following equations is valid? [closed]
$$ T = I \alpha $$
$$ L = I \omega $$
$$ T d(\theta) = d(\tfrac12 I \omega^2) $$
If I differentiate the second and third one with respect to time… all three equations give a different expression for ...
2
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1
answer
34
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Total angular momentum (torque) of multiple forces
If multiple forces act on a single body, we know that if the total angular momentum is null the body does not rotate. How does the principle take into account that I can take any point in space as the ...
- 141
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2
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76
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Serious confusion regarding central concept of torque
I have taken physics, statics, and dynamics, and I have no problem with applying the concept of torque to a problem. But, I just cannot grasp why a force a greater distance away from the axis of ...
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2
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1
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79
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How the object rotates?
Why the object actually rotates ?
When I researched about this topic , I have gotten satisfying answer from here:
Why do object rotate at all?
All the atoms and molecules of the object are connected ...
user329624
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1
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330
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Confusion regarding angular momentum of a tilted rod
I have a question regarding angular momentum and torque in the following example. This is not a homework problem, I just believe understanding some parts of this particular problem would help me ...
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204
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Torque of a rolling cylinder
I would like to ask the associated net torque equation for this diagram.
Since the tension force is directed counterclockwise, my equation for the torque was
However, the solution to the problem ...
- 19
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1
answer
635
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Torque direction and interpreting whether the object is speeding up or slowing down
I have understood that the convention is that counterclockwise Torque is taken as positive and clockwise torque is taken as negative, But my textbook says "If the net torque is positive, the ...
user318937
0
votes
3
answers
157
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Reasons for using Angular momentum, Torque and Moment of inertia to describe rotational motion
In order to describe rotational motion, we usually ditch the familiar concepts of force, linear momentum and mass, and use instead their moments to describe the motion. Is it just because it makes our ...
- 493
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2
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Determining the minimum amount of torque to make wheels start rolling
Context: I am building a cart with mass m (including the cart and the payload) that has 4 wheels. The 2 back wheels will be driven by motors. I am trying to determine the minimum amount of torque ...
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