Questions tagged [inertia]

Inertia is the tendency of a body to oppose changes to its state of motion. DO NOT USE THIS TAG for moment-of-inertia!

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4answers
350 views

Can we explain velocity without time? [closed]

I'm trying to wrap my head around inertia/velocity, or just change in general, I guess. I'm unsure exactly sure were my gap is, or what question to ask, so I'll explain with a scenario. Lets say I'm ...
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Beer can on a conveyor belt tilting [closed]

A full beer can of 3cm radius and 20 cm high is standing on a stationary conveyor belt. What is the maximum acceleration at which the belt can begin to move without causing the can to tilt.
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Integral Issue for Inertia of Disk

I am currently following Taylor's "Classical Mechanics" and I am trying to understand creating the correct integrals to solve some problems related to the inertia of various shapes. I am to ...
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Is centripetal acceleration an inertial acceleration?

I am trying to understand what component of the force on an object moving in a regular bowl enables the ball to complete a "semi circle", without any external force being applied. Is the net ...
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What is the definition of mass?

From what I have seen so far, there seem to be two fundamental criteria for considering something to have mass: First is that it must have inertia and therefore momentum, Second is that it interacts ...
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Physics of pushing the top of a box a little bit to make it rock back and forth

Context: I'm trying to make a simulation of a box that you can apply force to the top and it will oscillate back and forth until the energy in the system reaches equilibrium again. Visual ...
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5answers
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If inertia is affected by velocity, and velocity is relative, doesn't that mean that inertia is frame-dependent? [duplicate]

Here, by inertia, I mean the tendency of an object to retain its state of motion and resist change. Another way of defining inertia is how much force is needed to create a certain amount of ...
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Is inertia and gravity determined by relativistic mass or invariant mass?

As far as I know, mass fundamentally determines inertia and the gravitational force. But since there are two types of mass, which mass determines which? From what I have read so far, and correct me if ...
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Is inertia real reason for flow separation?

Consider airflow around square object, when an air particle A comes to the rear edge of an object. It is very logical that the particle would not turn at 90 degrees and follow back side of object, ...
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2answers
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Is there a way to find out how long a body will glide after a force is applied once? [closed]

Can you tell how long a body will retain it's motion after being given a push from x amount of force (ex. 15 force applied, motion will last 18 seconds)?
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1answer
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Is light affected by inertia?

A very popular way used by teachers to explain Einstein's theory that The speed of light is a Universal Constant, is to use an example as follows: Two observers moving relative to each other [let's ...
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2answers
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Why are roads sloped inwards in hills?

I recently noticed that the roads were sloped inwards at hills while taking a turn and a question jumped in my mind i understood that it is to provide centripetal force but if it isn't there why would ...
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Equivalence among three kinds of mass

If there are three kinds of mass (1) resistance (classical inertial mass, rest mass) (2) sensitivity to gravity (weight) (3) creation of gravity, the Eotvos experiment shows the proportionality ...
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When a car is coming to a stop is there any resistance offered by it to stay in motion?

Suppose a car is in a state of uniform motion moving at a high velocity and then begins slowing down due to force exerted by the brakes on the car. Will the car offer any resistance due to its inertia ...
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1answer
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What is the gravity/inertia question?

Is the discussion about how gravity and inertia are the same, about the idea that when you hit a ball, it doesn't come back but when you throw a ball up, it does come back?
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5answers
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Do pseudoforces arise due to inertia?

Wikipedia says The fictitious force is due to an object's inertia when the reference frame does not move inertially, and thus begins to accelerate relative to the free object. The fictitious force ...
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Is inertia still considered a mysterious force?

When I first saw, for example, weightless objects in a space capsule, I assumed that pushing them would require no effort because, of course, they did not weigh anything. On Earth, heavy objects are ...
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Inertia without gravity

Is there inertia in absence of gravity? If I was in a region of space with zero gravity, would I have to apply some force to accelerate a massive body?
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What is the relationship between the different aspects of mass?

There seem to be several different ways in which mass manifests itself, in particular with reference to fundamental particles: Gravitational mass. Inertial mass. The coupling to the Higgs field. The ...
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Do photons have inertia?

We all know the example where we say that a massless box containing photons has inertia, because the photons exert pressure of the inner walls of the box. But my question is about a single photon ...
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1answer
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Question on Reynolds number using Newton's definition of inertial force and how to obtain the common expression for Reynolds number?

The concept of inertial force is traced back to Newton’s Philosophiae naturalis principia mathematica, The Principia, Newton. At the beginning of his book, Newton presents eight definitions forming ...
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Flying a drone in a moving car/airplane

Why does a drone fly with respect to the air in a moving car/airplane, but not in an elevator as shown in this clip: What Happens If You Fly a Drone In An Elevator? I understand that the drone will ...
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2answers
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What are the “masses”?

I know there are three "masses". "inertial mass", based on Newtonian Mechanics "rest mass" and "relativistic mass", based on relativity Anyone can explain three ...
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What physical phenomenon causes racing bike to lift automatically after it fall down?

What physical phenomenon causes racing bike to lift automatically after it fall down? What causes it to travel further distance after it fall down? Please help me. Animation: YouTube link :https://...
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Inertial mass and gravitational mass [closed]

I would like to ask about gravitational mass. I know inertial mass is changing by motion (speed) according to $m=\frac{m_o}{(1-v^2/c^2)^{1/2}}$ And also that is inertial mass which sits in $E=mc^2$. ...
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1answer
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Changing effective mass of electron using electric potential?

The Dirac equation for an electron in the presence of an electromagnetic 4-potential $A_\mu$, where $\hbar=c=1$, is given by $$\gamma^\mu\big(i\partial_\mu-eA_\mu\big)\psi-m_e\psi=0.\tag{1}$$ I assume ...
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What if inertial and gravitational mass were different?

It's well known and heavily documented that gravitational and inertial mass are identical. This has been experimentally tested to many digits of precision. But nothing I've seen ever describes how ...
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Does the Higgs field explain inertia?

As far as I understand it the Higgs field leads to the creation of rest mass for certain elementary particles but does it explain the phenomenon of resistance to acceleration associated with rest mass?...
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Does general relativity explain inertia?

As far as I understand it general relativity does not explain the origin of the inertial mass $m_i$ in Newton's law of motion $\vec{F}=m_i\ d\vec{v}/dt$ but rather it simply applies the concept to ...
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Is “Mass” really measuring unit for inertia?

Imagine if two objects of identical mass are under two different gravitational field,let's say two different planets (with Different value of gravity) both of the objects are of same mass,but we can ...
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Can sway be eliminated in the pendulum cart problem?

This problem is similar to the cart-pendulum problem. I have a cart and a mass attached to the cart via a weightless string. Both the cart and the mass are travelling at a constant speed in the same ...
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Why do objects have inertia? [duplicate]

I was going through the chapter of "Newton's Laws of Motion", where I was introduced to the concept of inertia in Newton's First Law. I saw that all objects that have mass will have ...
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3answers
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Are falling objects harder to push compared to objects at rest

While an object is still in the air falling under the influence of gravity, does it take greater force to push or steer it to the side compared to when the object is in a state of rest?
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Is inertia the same as centrifugal force?

My cousin told me that inertia is just a pseudo force that act on a thing, because he said that inertia is the same as centrifugal force. But when I search for the true fact in Google, I found that ...
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How do you apply each of Newton's laws to specific scenarios?

The 3 Newton's laws of motion are easy to be understood but examples citing which law caused it are so confusing - say a bullet fired from a gun - many people state it cause is 3rd Law - but I see all ...
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How to calculate heat loss of a building using thermal inertia

I need to calculate the amount of heat that is lost in an hour. I know the temperature of the building the (effective) temperature of the outside and the thermal inertia of the building. The building ...
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Confusion about an example of inertia related to bus

When the bus is stationary the passengers are also stationary. When the bus starts moving the part of the body (lower part) in contact with bus starts moving, but due to inertia the upper part remains ...
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1answer
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Why lighter bottles stay on better rather than heavy bottles?

I was watching a Mythbusters video of them doing the table cloth trick and Adam says that the lighter bottle worked better. Don't heavy bottles (more mass) have more inertia and therefore should work ...
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1answer
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Working principle of an accelerometer

I'm trying to confirm my concepts regarding inertia and accelerometers. Need to verify / correct my thoughts, which are as follows: Inertia is the property of matter to resist a change in its state ...
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1answer
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Why can't we measure inertia? what are the applications of inertia?

why there is less importance for 'inertia' in school studies...does the concept of inertia is least significant nowadays? is inertia a measurable quantity? Is there any application of inertia?
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Why is Newton's First Law not considered a vacuous statement? [duplicate]

How did Newton come to postulate the law of inertia when every inertial body that he was considering was (by his own other hypotheses) being acted on by the force of universal gravitation. In other ...
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1answer
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Moment of Inertia using centre of mass knowing distance and weight of rod [closed]

I know the mass, I know the center of gravity position. Can i use this to work out the moment of inertia of a rod. So my ruler is 30 cm long and I know its mass to be 11.8g I have some blu tac which ...
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How can energy have inertia?

How can energy have inertia? To my intuition, inertia is so closely associated with mass that my intuition says "Huh?" Indirectly by mass energy equivalence it works fine, for example: I have a ...
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1answer
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Inertia and related quantities

I wanted to know what is a frame of inertai? Specifically, what does it mean by a frame? I know that inertia is the restistance to motion of a mass, a larger mass resists motion more than a smaller ...
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1answer
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An expanding, sliding charged tube's self-imposed electromagnetic induction

If I have a simple cylindrical electrically-insulating tube possessing a net electrostatic charge and allow the tube to slide parallel to the tube's axis, that tube will possess electric currents ...
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Definition of mass

In high school physics, I was taught that mass was just how much "stuff" or matter there is in an object. However, now that I am learning physics again in college, I am taught that mass of an object (...
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Calculating end position from existing position, velocity, deceleration and time

I am writing a piece of software where the user can drag an element only on the x axis. When the user lets go of the drag while the item is in motion I can determine the x velocity and the current x ...
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1answer
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Why won't a full laundry basket bounce?

I've noticed a curious behavior of my plastic hamper and laundry baskets. When they are empty tossing them more then a few feet from hip height (3 feet) causes them to bounce and tumble. Yet when they ...
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If the aircraft has no inertia, how will it move after losing power?

If the aircraft has no inertia, how will it move after losing power? I think because of the aerodynamic force, the aircraft stopped moving immediately. Am I right?
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What is the cause of motion in geodesic

The shortest or longest path in curved space between two points is geodesic . What about a body having no potential energy was put in geodesic near earth , what makes it move , May be it is about the ...

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