All Questions
96
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Why is the moment of inertia the rotational analog for mass and not inertia?
I've thought that both mass and the moment of inertia measure an object's inertia, one being in translational motion and the other in rotational motion. That has made complete sense to me, but in my ...
- 11
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17
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Mass moment of inertia flipping in different mediums
Consider someone performing a front flip in the water versus in the air. Assume the body position in both cases to be identical. In which case would the mass moment of inertia be greater and why?
Prof ...
1
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4
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56
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How to calculate time needed by an object to change its state of motion when an net force applies to it (inertia)?
(Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This tendency to "...
- 11
1
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23
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Can added mass depend on stochasticity of motion?
Can added mass (also called virtual mass or induced mass) of a voluminous object in a massive fluid surrounding be affected by some stochastic motion of the mass (relative motion between the object ...
- 966
2
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2
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687
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Can someone explain 'virtual mass' in fluids in simple words (for a dummy/high schooler)?
so I recently came across the term 'virtual mass' and when I looked up more about it, it just gave me some stuff about fluid mechanics that I dont understand properly. My understanding of virtual mass ...
1
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1
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98
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Inertial Mass = Gravitational Mass. Why? [duplicate]
Okay, so the inertial mass of an object is always equal to the gravitational mass of the object. Conceptually, however, they seem different. Then what makes them identical? Is it because they are ...
- 1,065
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1
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54
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Propellant less propulsion when there is nothing to push against
Is there a way for a vehicle to move without losing mass when there is nothing for the vehicle to push against? For example, a helicopter flying around in a vacuum.
14
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4
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2k
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How does classical, Newtonian inertia emerge from quantum mechanics?
From my understanding, inertia is typically taken as an axiom rather than something that can be explained by some deeper phenomenon. However, it's also my understanding that quantum mechanics must ...
- 545
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6
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1k
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Mass definition
One definition of mass is 'a measure of the quantity of matter in an object at rest relative to the observer'. What do 'at rest' and 'relative to the observer' mean here? I know it has to do with mass ...
1
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1
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Explaining how the Higgs fields gives particles mass [closed]
Physicists say the Higgs Field is like syrup and slows particles down from the speed of light. Wouldn’t it be easier and more correct to say there are no particles, just fields, and the strength of ...
- 49
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9
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When we say inertia is the quality of matter to resist changes in velocity, in what way does it 'resist'?
Until today I used to understand and explain anyone the concept of inertia in the following way, but I found a loophole in that explanation.
Explanation :
Imagine we take a body in space where there ...
- 521
21
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5
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What is the origin of the inertia?
Is there any explanation why it is harder to move an object with more mass than an object with lesser mass? What kind of force is opposing our force? Is it finalized currently and well known what the ...
- 347
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3
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Do electrons have inertia?
I don't know quantum mechanics and know a little bit about mechanics and a very little bit about subatomic particles but I am just a curious to know the answer to my question. My question is if '...
- 157
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6
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Would you run faster on Mars?
Given the 1/3rd of Earth's gravity on Mars and neglecting space suit limitations and also assuming you have maintained your muscle strength, would you run faster on Mars?
The answer may not be so ...
- 4,170
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2
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Are there two competing definitions of "inertia"?
The term inertia is often introduced by stating Newton's first law: An object stays at rest or moves with $\vec{v}=const.$, if the resultant force is zero. This feature of masses is called "...
