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Results tagged with newtonian-mechanics
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user 208138
Newtonian mechanics discusses the movement of classical bodies under the influence of forces by applying Newton’s three laws. For more general concepts, use [classical-mechanics]. For Newton’s description of gravity, use [newtonian-gravity].
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Why can’t we consider these two masses as a system in case of a pulley?
Two masses M and m, attached by a massless string. The surface they are on is frictionless. In the first case, another massless string attached to mass m, which is pulled to the right with a force F …
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Equilibrium position of a spring vs its mean position
“Equilibrium position of a massless spring vs its mean position”
I am confused about these two terms. Do they mean the same thing? I understand the term ‘mean position’. Let’s say one end of a vertic …
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Does kinetic friction increase a body’s acceleration once the body starts moving?
Let’s say there is a block of mass $1$ kg resting on a surface. I studied in my textbook that coefficient of static friction is usually greater than the coefficient of kinetic friction for a given pai …
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Friction between a banked road and tyres of a car
Let's say there is a car which is at rest on a banked track. The angle of banking is $\theta$ and coefficient of static friction between car's tyres and the track is $tan\theta$. Since coefficient of …
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When we pull a tablecloth off a table with a glass on it
On doing a Google search, it says the glass stays put if we pull the tablecloth fast enough, as in, the glass does not move at all. I have seen some videos and the objects put on the tablecloth seem t …
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Massless string vs massless spring in a mass-spring system
Two masses connected by a massless spring, on a frictionless surface , and a force of $60$N is applied to the 15kg mass such that it accelerates at 2 $\frac{m}{s^2}$. What is the acceleration of …
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Why do we define the stability of a body only under the action of conservative forces?
Why do we analyse the $stability$ (Stable, unstable, or neutral) of a body only under the influence of a conservative force? What if non-conservative forces are acting on the body as well?
For examp …
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What does an acceleration greater than $g$ feel like?
I hope I have put a pretty good title for this question. I was watching Professor Walter Lewin’s lecture on classical mechanics (lecture 7, I think).
Let’s say a person is hanging from a string (by …
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Angular variables like $\omega$, $\alpha$, etc are properties of the moving particle or the ...
Angular displacement ($\theta$) of a moving particle is the angle through which its position vector rotates, with respect to a reference point.
Angular velocity ($\omega$) of the particle is the rat …
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Potential energy of a spring vs potential energy of the spring-mass system
What is the difference between potential energy of a spring and potential energy of the spring-mass system?
The reason I am asking this question is, is elastic potential energy a property of the spri …
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Is tension along the length of a massive rope resting on a table always the same?
Mathematically it can be easily proved using Newton’s 2nd law that tension along the length of a massive rope just lying on a table and not accelerating, is the same. But is it always the same? It sho …
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Ratio of $F_{net}$ acting on a body to its weight?
The acceleration of a body, expressed as a multiple of $g$, is $always$ equal to the ratio of the net force on the body to its weight.
What does this statement mean? Is it referring to the g-f …
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Application of Newton's laws : A system of three blocks [closed]
This is a question from my physics coursebook. Everything in the picture should be self-explanatory. Pulley and string are massless. There is friction between contact surfaces of block A and block C …
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Work done by a spring on a block
A spring has a block attached to one end and the other end is attached to a wall. As the ball is displaced right or left, we know spring force $F_{sp}$ $=$ $-kx$, always in the direction opposite to …
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Why does Friction not accelerate the body in this case?
My textbook says (see the highlighted paragraph below), "Normal is the perpendicular component of contact force, while friction is the parallel component".
First of all, I am familiar with how frictio …
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