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Results tagged with newtonian-mechanics
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user 380387
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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Is a body in uniform circular motion in equilibrium?
Equilibrium means that the net force on the body on any chosen axis is zero. A body in uniform circular motion has constant magnitude of velocity, but its direction is continuously changing (always ta …
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Can't understand inelastic collisions
Kinetic energy, during a collision, is lost, for eg., as sound energy. If there is no dissipation of energy in any manner (sound/heat/light) we call it an elastic collision, and then you can conserve …
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What is the velocity of centre of mass in centre of mass frame?
From ground frame, the centre of mass does have a velocity. From the reference frame of the centre of mass itself, its (relative) velocity is zero.
Imagine you are standing on the ground, and a car p …
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What's the connection between force and energy?
Work done on a particle is not the intrinsic property of the particle itself. Different forces can have different work done on the particle. The net work done, i.e. the summation of work done by all f …
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The lowering of a block using a spring and the net work done by each force involved
What changed is: the block wasn't slowly lowered, meaning it acquired a velocity while freely falling. What will happen now is it will oscillate up and down.
In the first case elongation is $\frac{mg} …
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Normal Force and Newton's Third Law
"Push on the table by the book." said force in your question is gravitational force, between the earth and the book, with a magnitude equal to its weight $mg$. The normal by the table is due to Newton …
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Formation process of parabola in rotating water cup
Assume water rotating in a cylindrical bucket:
I will take a random 'cylinder' of water from this(and treat it as separate from the rest of the liquid)
Then drawing FBD of that cylindrical 'block' of …
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Centre of masses of 2 bodies together
It is correct. What you're actually saying is:
$$\frac{ab+cd}{a+c}=\frac{a\frac{ab}{a}+c\frac{cd}{d}}{a+c}$$
Where a is mass of the rod, b is the coordinate of its center of mass, c is mass of the cur …
CommunityBot
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Formula for Work
You can't just ask the formula for work without specifying
You can ask the formula for work done by the force on the object, which would be $Fscos\theta$, where F is the magnitude of said force. This …
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Acceleration on a system of two particles
Internal forces are those forces which are applied on both the particles, of equal magnitudes and opposite directions.That being said, in answer to your query:it depends on what the forces are. The te …
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What is the acceleration experienced by a person walking into a tree or pole?
Well, if someone walks into a pole, their velocity goes from $0.80 m/s$ to $0 m/s$ in a very small time interval, so acceleration would be infinite, since time approaches zero. With the work-energy me …
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Work done in raising an object to a height
When we raise an object to a height $h$, it is said that the potential energy of the object is increased by $mgh$. But isn't the work done by gravitational force $-mgh$?
Then that will essentially mea …
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On which side of object should friction force be drawn on a vector diagram?
Force is a vector quantity. Parallel shifting of vectors is allowed while judging translational motion. You can pretty much put that arrow anywhere on the block so long as you know it is actually appl …
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Banked Corners and Centripetal Forces Question
Here if you resolve normal reaction into components:
$$Nsin\theta=mg$$
$$Ncos\theta=\frac{mv²}R$$
and on simplifying the second equation you get
$$v=\sqrt{Rgtan\theta}$$
You'll notice that there is on …
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Rotating a rolling-without-slipping wheel in the direction that makes the contacting point h...
Rolling without slipping in that would not not possible on a stationary platform, however on a platform moving with 2v, rolling without slipping can still take place.
The whole point of rolling withou …
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