Newtonian mechanics covers the discussion of the movement of classical bodies under the influence of forces by making use of Newton’s three laws. For more general discussion of energy, momentum conservation etc., use classical-mechanics, for Newton’s description of gravity, use newtonian-gravity.

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How far would an arrow go in a space station and still be deadly?

So I was answering a question on the WorldBuilding SE site and one aspect of my answer made me wonder. Imagine you are on a massive space station of unlimited size. If you were to fire an arrow from ...
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31 views

I can't grasp the idea of how Newton's laws are coordinate dependent? Could anyone suggest me any book for problem solving in classical mechanics

I am reading Classical mechanics by Goldstein and have crossed 55 pages and still couldn't grasp how Newtons law is coordinate dependent. And I problems in Goldstein are extremely difficult is there ...
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1answer
31 views

Orbiting in space

Background I'm making a game where a spaceship needs to orbit another object in space at a set distance. Space is, unlike other game, like space is in reality. Friction less. (at least to my ...
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3answers
99 views

What would happen if a ball flew through the open window of a car?

I asked a science teacher this question a while ago but I did not receive a clear answer. Now, I was hoping someone on this Physics site could shed some light on my conundrum, I've been wondering for ...
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0answers
26 views

Find the momentum the force creates on the corners of the rectangle

In this problem there is horizontal force of 100 N pointing away from the right top corner and the task is to find the moment it causes at every corner. The sides of the rectangle are 5 and 3 meters. ...
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0answers
72 views

Virtual work problem from Feynman's tips on physics

"What horizontal force $F$ (applied at the axle) is required to push a wheel of weight $W$ and radius $R$ over a block of height $h$?" Here is a link to Michael A. Gottlieb’s Solution (using virtual ...
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0answers
19 views

about the motion of electrons inside the atom [duplicate]

My question is very basic question.I am somehow not able to understand it. bohr's theory says that the electron can only revolve in orbits which they have quantised angular momentum so they must ...
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0answers
17 views

Pseudo acceleration when both observer and observed body are accelerating and also the surface is accelerating

Today we were taught us the concept of pseudo forces.I understand that suppose when the observer is in an accelerated reference frame to make newtons laws valid we consider an acceleration in the ...
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3answers
269 views

Meaning of the Value of Centripetal Acceleration

In the traditional sense, acceleration means the rate at which velocity is changing. Visually, we tend to associate this with the magnitude of velocity. If the centripetal acceleration of the moon ...
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0answers
56 views

Feynman's explanation of virtual work given in his book Feynman's lectures on Physics

In his book Chapter 4 Conservation of Energy, on Gravitational potential energy the discussion goes... "Take now the somewhat more complicated example shown in Fig. 4-6. A rod or bar, 8 feet long, ...
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1answer
37 views

Two carts on a frictionless rail collide [on hold]

There're 2 carts on a frictionless rail. Their masses are $4m$ and $2m$. (The carts are on the rail in this order). The first cart has a velocity of $v_1$. The first cart hits the second. Knowing that ...
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1answer
38 views

Friction in circular motion?

Let us imagine a car (or just a block) moving in uniform circular motion with radius $R$ with velocity $v$, on a flat surface. It is obvious that friction is the only force capable of providing the ...
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0answers
23 views

Seesaw pendulum period

If I have a rigid pendulum of length $L$, with the pivot point set somewhere along $L$ and a mass at each end how do I calculate its maximum speed and its period? I want to make a counterbalanced slow ...
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3answers
66 views

Why does weight on Earth have a tangential component?

I read in Pulsar's answer of this question that weight has a tangential component due to the rotation of the (assumed spherical) Earth but I don't understand this. Can someone expand on it please?
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0answers
17 views

Multi Car collision [on hold]

If a 2.8k lb car impacts with a 5k lb truck at an angle that lifts the back of the truck (impact at 25mph), would the truck be able to push 3 cars weighing at 3k, 5k, and 3.5k forward 20 ft when ...
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0answers
11 views

Cohesion Sliding Resistance meaning

What do we mean by "Cohesion Sliding Resistance"?? and how to calculate the value for the same for an iron object placed on a concrete surface for example? P.S.: All I know is this has the units of ...
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2answers
72 views

Equal transit time fallacy and Newton's laws of motion

I've seen the equal transit time theory being used to explain aerodynamic lift [basis is Bernoulli's principle] several times. However recently I've been told that there is NO physical compulsion for ...
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1answer
24 views

Weight Detection Under Concrete/Asphalt [on hold]

Consider that a weight sensor was embedded in a road. Would cars that drive over it trigger the sensor? I was thinking it'd look something like this (if we ignored the downward force that the ...
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0answers
15 views

How can I find the acceleration of a spring when the spring is elongated of $x = y$ $meters$? [on hold]

Good morning to everyone! I have a problem that I don't know how to solve: I have a block on a plain, I know its mass I know the angle of inclination of the plane, and the coefficient of friction. It ...
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0answers
73 views

If mass rotates at varying speed, will the whole system be pulled in the direction of the strongest centrifugal force? [on hold]

And, what are the implications in terms of Newtonian law of action and reaction, as well as conservation of momentum and conservation of energy? Practical example: https://www.youtube.com/watch?v=-...
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0answers
25 views

Laws of motion in use [on hold]

Do the laws of motion apply to photons and other particles like mesons,gluons etc.Can you please specify the reason if yes and no
2
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3answers
59 views

Second Law of Dynamics and Pulleys

The system in the figure is initially at rest . If the system starts to move , evaluate the acceleration of the block $A$. Mass of the block $A$ is $m_A = 60\;\mathrm{kg}$ ; mass of blocks $B$ and $C$ ...
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1answer
45 views

Newton's 1st law [on hold]

If all of a sudden the gravitational force and gravity disappears then the planets would still continue to rotate and revolve ? Give reason
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1answer
17 views

Reducing coefficient of friction by vibrations?

Very simply put, if one places a block of some material on a level surface and pushes it horizontally, a certain coefficient of friction is measured. If one tightly couples an oscillator of some sort ...
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0answers
32 views

Double Atwood machine alternate solution is wrong? [on hold]

** NOTE I cannot post multiple links due to reputation so here is my reference link.** I came across a double atwood machine problem where we were to find the acceleration of each mass(image in link)....
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1answer
97 views

Friction to just move the blocks

Two blocks each of mass $m$ are placed on a rough horizontal surface and connected by mass-less in-extensible string as shown.The coefficient of friction between each block and ground is $\mu$ What ...
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0answers
58 views

In the equation $F = kma$ , what's $k$? [duplicate]

Actually I want to know that what is $k$ & why it's SI unit is set to 1. Also if it's can be expressed in SI units , that means it can be converted into CGS etc. units .. So what's the value of $k$...
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1answer
38 views

Kinetic energy of a Tesla model S discrepancy

According to Tesla, the model S weighs 1961 kg and uses 237.5 watt hours (855000 Joules) to drive one km. However, when I plug this amount of energy and 1000 meters into the formula W=FD, I get the ...
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0answers
32 views

How much velocity can a canister of fuel give a spaceship? [on hold]

We could approximate a basic solution If we know the mass of the fuel $m$, the mass of the ship $M$ and the amount of energy left in the fuel $E$. So the energy density of the fuel is, $\frac{E}{m} = ...
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0answers
22 views

What is a second pendulum? [on hold]

There are many pendulums having different time period say 2,4,etc but we read only of "second pendulum". Interestingly Once I heard that this pendulum was used for standardization,how? And can you ...
3
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2answers
61 views

How deep does a gravity well need to be to remove particles from a planetary body?

I almost considered asking this question on WorldBuilding, however I wanted the brute mathematics on the subject, so please excuse the theoretical nature of this question. I understand the basic ...
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2answers
43 views

Harmonic motion equation - non-null right hand side

Considering the following motion equation : \begin{equation} \ddot x + \frac{a^2 b^2}{c^2} x = -V \frac{a b}{c^2} \end{equation} where $a$, $b$, $c$ and $V$ are all constant. One can identify the ...
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1answer
29 views

Question on motion of vehicles [on hold]

What slows us down while we are climbing in a sloped road, and what makes us faster while sliding down? Friction and what else?
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33 views

Acceleration mass graph of constant force

If the same horizontal force is applied to objects of different mass. Which graph explains the experimental results. My logic was that since $$ f = ma $$ Is a linear equation it will be a straight ...
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0answers
20 views

Calculating failure load [on hold]

I am trying to determine the maximum load before failure on my welded bolts. I am using a hydraulic rig, in which i can read the pressure in bars through a manometer, but the thing is, i am confused ...
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1answer
41 views

If the applied force is constant, what is the graph of the velocity?

This is a sample interview question from Oxford: A ball, initially at rest, is pushed upwards by a constant force for a certain amount of time. Sketch the velocity of the ball as a function of ...
-2
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1answer
67 views

Observation and deduction about a stick

Given a horizontal stick AB and a string, of course a stick that is hang on the string in its center of mass is in equilibrium. This is a fact that we take as rule because we can observe it, right? I ...
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0answers
41 views

Concept of Projectile Motion [on hold]

A projectile is thrown from a platform at a height 10m with a velocity of 20m/sec . At what angle should the projectile be thrown to reach the farthest point from o , which is vertically below the ...
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2answers
135 views

Does a scale weigh a bee flying inside a box?

This question is very similar to this one or even this one except some minor differences. The box is much larger than the bee. The box has no top cover. The bee is flying still in the middle of the ...
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0answers
49 views

Potential Energy = mgh. What is the name of this principle and did Newton discover it?

Somebody I know keeps trying to convince me that Potential Energy $PE=mgh$ is one of Newton's Laws (as well as the closely related idea, Work Done = force x distance moved). I am fairly certain that ...
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2answers
48 views

Accelerated frames conceptual doubt [on hold]

This thing has baffled me for a very long time and therefore I had to ask it here. I was thinking about accelerated frames. Lets assume I am sitting in an elevator going upward with some acceleration ...
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0answers
29 views

Numerical problem [on hold]

A spacecraft weighing 500 kg is drifted of its course at a point 60,000 km from the impact point by 100km perpendicular to the actual trajectory. Explain the course correction manoeuvre, giving the ...
-1
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1answer
73 views

What happens if you fly a drone inside moving passenger airplane? [duplicate]

I have a little question. If I mark an X in the center of a passenger airplane, and try to fly a drone from the X mark in the moving passenger airplane (800-900 km/h), what will happen to the drone? ...
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0answers
35 views

Calculate displacement of one body connected to an other by spring and forced in a direction [on hold]

Two bodies of mass $M_1$ and $M_2$ are connected by a spring but are otherwise free to move along a horizontal line. A periodic force $F\cos\omega t$ is exerted on the body of mass $M_1$ along the ...
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0answers
14 views

Projectile on inclined plane [closed]

Two inclined planes OA and OB as shown . A particle is projected from point P with velocity u along a direction perpendicular to plane OA . If the particle strikes plane OB perpendicularly at Q , ...
0
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0answers
14 views

Calculate velocity $v$ [on hold]

A lorry of mass $3.5\times10^4\text{ kg}$ attains a steady speed $v$ while climbing an incline of $1$ in $10$ with its engine operating at $175$ kW. Find $v$. $g=10ms^{-2}$. Neglect friction. The ...
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0answers
5 views

Acceleration as a function of time in Newtonian gravity [duplicate]

In Newtonian gravity, you have acceleration as a function of separation distance $r$ as $a(r) = GM/r^2$. I need to derive acceleration as function of time, i.e. $a(t)$. PS I got into this when I ...
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1answer
29 views

Newtonian mechanics, block on conveyor belt [closed]

The coefficient of friction $\mu$ between the block and the conveyor belt is $0.3$ and the belt is moving with a speed of $6m/s$ when a block is dropped onto it from rest. Find the time when the ...
0
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1answer
19 views

The directions of the frictional force acting on the cylinder while ascending and descending cylinder

A cylinder rolls up an inclined plane,reaches some height,and then rolls down without slipping throughout these motions.The directions of the frictional force acting on the cylinder (A)While ...
2
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1answer
40 views

Cable wakeboard raley

Illustration of the problem: http://www.youtube.com/watch?v=OWRixptJaRo The non physics solution: http://www.youtube.com/watch?v=FRwHcJjfCR4 My first approach to learn this was to follow youtube ...