Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [newtonian-mechanics]

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.

0
votes
0answers
15 views

Tug of War force of tension [duplicate]

There are two people pulling on a rope at both 400 N equally. What is the force of tension on the rope. They are equally centered from each other? I said the tension of the rope is 400 N, because ...
0
votes
1answer
28 views

Sliding to Rolling

In a problem where a sphere is initially sliding and then begins to roll after having travelled some distance. The thing that confused me is that the work done by friction on the sphere is not simply ...
0
votes
2answers
32 views

How to find velocity of colliding particles on string?

could anyone please help me with the following. I'm working through a mechanics book for my own interest but have found myself unable to see how to start this question. I don't request the answer just ...
0
votes
0answers
20 views

Lack of Gravity of an object suspended in mid-air [duplicate]

I Would like to know what would happen to an object suspended in mid air overtime as the earth rotates. with gravity not having effect on it as the earth rotate will it also move or will it stay in ...
0
votes
0answers
18 views

Equilibrium of forces acting on a lifted car

Assuming there is a car that lifted by a tow cable such that only the rear wheels are in contact with the ground, how does the tension in the tow cable, the weight of the car and the contact forces ...
0
votes
0answers
15 views

Does ABS increase the breaking distance of a car? [on hold]

Question: Can an ABS (Anti-lock Braking System) instead of decreasing the breaking distance actually increase it? If yes, is this its general behaviour, or only in specific circumstances? Wikipedia ...
0
votes
1answer
39 views

Torque lesson in Physics

For the force on a current-carrying wire, Torque, was derived using the assumption that the cross-section area of the wire is constant along its length. Is this equation still valid if the cross-...
-1
votes
4answers
65 views

Can you derive the acceleration of a cylinder rolling down an inclined plane by ONLY using conservation laws?

I want to solve the standard problem of a cylinder rolling down an inclined plane by only using conservation laws. In particular I want to use the equation: $$E_{pot}=\frac{1}{2}mv^2+\frac{1}{2}I\...
-3
votes
0answers
26 views

Pressure on feet, Physics [on hold]

Give that pressure on the feet is P newton per square meter, how much is the pressure on one foot?
-3
votes
0answers
27 views

Artificial gravity in a rotating torus [on hold]

in this anticlock wise rotating torus is gravity towards BΓ or AΔ and why. Does the clockwise/ anticlockwise rotation matter? (Assume there are no other objects near the torus)
0
votes
0answers
31 views

Mechanics & Angular motion [on hold]

The added pictures show the problem and my attempt to a solution. My answer is off by a factor of 1/2, as the answer is given as v = ½vₐtanθ. I feel at this point, the problem is more conceptual than ...
-5
votes
0answers
19 views

Physics with trigonometry homework questions? [on hold]

4) Two cars approach a snow covered (frictionless) intersection. Car A has mass Ma = 1800 kg, and Va = 12î m/s. Car B has mass Mb = 1200 kg, and Vb = 15j m/s. a) what is the total initial momentum, ...
2
votes
0answers
48 views

What are the fundamentals of motion in a non-inertial reference frame?

First of all, note that I understand what is considered off and on topic here. I'm posting this because I likely lack some sort of conceptual understanding of motion in non-inertial reference frames, ...
0
votes
4answers
90 views

Potential energy of system or particle of the system?

Why in gravitational potential or also electrical potential energy we refer to potential energy of 1 particle of the system and not whole system? for example in system earth and a ball we speak about ...
0
votes
0answers
34 views

Calculating the orbit's radius

The problem says: The angular velocity which describes a satellite in a circular orbit around the planet Venus is $\omega= 1.45 \times 10^{-4}$ rad/s and its angular momentum regarding the center ...
1
vote
2answers
21 views

Reaction forces in electrodynamics

Consider two conducting plates, at different potentials so as to set up an electric field. A charged particle is released in the field. The particle experiences a force for sure, but is there a ...
0
votes
0answers
7 views

What forces should I apply in order to make a craft reach a point? [duplicate]

I'd like to find out a strategy for solving the following simplified problem. A small spherical craft at $t=0$ has a position and velocity vectors $\mathbf{x_0}, \mathbf{v_0}$ in a zero gravity ...
0
votes
2answers
30 views

The work done to carry the missile the horizontal distance at the maximum height

When a missile is launched at an angle between zero and ninety degrees, it makes a parabolic trajectory. Now at the maximum height (midway of trajectory) I understand that there would be work done to ...
0
votes
1answer
24 views

Why does the center of mass of car- Earth system changes with the car moving while no external forces acting?

Let's suppose that the humans in world are distributed symmetrical so that the centre of mass of earth lies at the very centre of earth. Now a giant car comes in with great speed that it moves down ...
-3
votes
0answers
17 views

Simple pendulum and energy [on hold]

a simple pendulum with length l is known to oscillate with a period T seconds. If the length of the pendulum is increased to 2l and the maximum displacement remains the same, the total energy of the ...
-2
votes
1answer
24 views

How can I detect large shifts in weight on a table? [on hold]

I asked a similar question in the raspbi forum and they sent me here. I have a table (15kg) at the office where routinely packets with weights that range from 40-100kg are placed. I would like to see ...
0
votes
1answer
46 views

Horizontal work done by Projectile reaching maximum height [on hold]

When a projectile is launched, let's say at 30 degrees, when it reaches maximum height, are the vector components (x component and y component) related to the work done by the projectile? Was ...
3
votes
1answer
51 views

Derive formula for air resistance $F = \frac{1}{2}CAdv^2$ through dimensional analysis

I have an assignment, where I’m required to derive the formula for air resistance for a falling object. $$ F = \frac{1}{2}CAdv^2 $$ where $C$ is drag coefficient, $A$ is the cross-sectional area, $...
1
vote
2answers
72 views

Newton's cradle: why not twice the balls at half the speed? [duplicate]

For "Sinterklaas" (Dutch holiday) I got a Newton's cradle. I understand the basics of it, but a couple things bother me. If I drop one ball, one bounces off. If I drop two, two bounce off. Why, if I ...
0
votes
1answer
26 views

Which direction will this object move in at the end of this process?

1) Consider an object with no net force acting on it moving with a constant velocity v. It has a momentum mv. 2) Now let a force F1 act on the object. Let the direction of this force be opposite (to ...
1
vote
1answer
56 views

The minimum diameter of a sphere such that a cone may balance on it [on hold]

There is a solid sphere of diameter D, with a right circular cone placed on top of it. The cone has a height h and the diameter of the cone base is d, and d=h. Explain why the minimum value of D (...
0
votes
2answers
27 views

Elastic potential energy and springs

The formula for elastic potential energy(for a spring) has been derived by assuming the following things: 1.Work done by a deforming force on a spring from a relaxed state (state where spring is not ...
-1
votes
1answer
55 views

Action and reaction [on hold]

If Plank's constant h physical meaning action can be related with the Action of Sir Issac Newton's third law of motion. Secondly, In Newton's third law of motion if actions represent force only , not ...
-1
votes
0answers
17 views

Minimum velocity required for a particle to reach the top of glass smooth in the insides? [on hold]

A glass is kept on a horizontal surface (There is no data given about the friction and the fixture of this glass on the surface.), this glass is smooth from inside, a point mass m kept on the bottom ...
0
votes
0answers
14 views

How would the skidding distance change if the initial speed of the car were doubled? [on hold]

A car with a mass of 800 kg is traveling with an initial speed of 10 m/s. When the brakes of the car are applied, the car starts to skid, and it experiences a frictional force with mu=0.1
0
votes
0answers
18 views

lateral forces acting on a stable vs unstable ladder [on hold]

It's been several summers since my Physics O'Level, and my recall is failing. Please could anybody do me a quick summary of the lateral forces acting on a man up a ladder, both in its stable state, ...
0
votes
2answers
41 views

Simple harmonic motion in physics [on hold]

When can you say that an electromagnetic compass is experiencing simple harmonic motion?
2
votes
0answers
19 views

What can I investigate concerning the stability of bikes? [on hold]

I'm in high school, and I'm doing an Extended Essay for IB? I only have 1 bicycle and no fancy tools or measurement equipment, so it has be a pretty simple experiment, but complex enough that I can ...
-2
votes
2answers
57 views

In theory does 1 Watt of energy accelerate a 1 KG object 1 meter faster each second it is input? [on hold]

Can 1 Watt of energy accelerate a 1 KG object 1 meter faster each second it is input? (Laterally in an ideal environment) (Basically wondering what the Watt equivalent standard to 1 Newton is when ...
-1
votes
1answer
21 views

Function for Rope Tension [on hold]

A mass M hangs from a uniform rope of length L and mass m. Find an expression for the rope tension as a function of distance y measured downward from the top of the rope. I know that net force in ...
0
votes
1answer
49 views

Santa and conservation of momentum. How is it possible that conservation of momentum doesn't hold here?

Santa wants to deliver his presents but his reindeers are on strike. In order to still be able to get somewhere he decides to sacrifice some of his presents to gain speed. He decides to throw them ...
1
vote
0answers
38 views

Collision response with spring physics in RK4

I'm trying to figure out what's in the title. I've gotten regular spring physics working and now I'm trying to do something similar with actual collisions (player character colliding with the ground ...
-1
votes
0answers
15 views

Ball thrown up from a train moving in circular track [duplicate]

when the ball is thrown up in a train moving in circular track the ball take a parabolic path opposite to centripetal force (due to fictitious force),with respect to the person who is throwing the ...
-3
votes
0answers
44 views

path of a ball thrown up [on hold]

Consider a man inside an accelerating train. When he throws a ball up, what is the path of the ball as observed by the man (who throws it). In the above what is the path of the ball if the train is ...
-2
votes
0answers
32 views

Help me find the velocity! [on hold]

There is no friction in any surface, how do i find the velocity of m when it reaches the end of M
0
votes
5answers
87 views

What is holding things like the Earth and the Sun in one dimension?

I was thinking last night: for most of my life I’ve been taught that the planets in our solar system orbit the Sun, which insinuates that the Sun is in a fixed point in 3-dimensional space, and that ...
-1
votes
2answers
36 views

A force is not parallel to the velocity of body but makes some angle with it. What does it do

Does velocity acts always in the direction of motion? In what cases direction of force and velocity are different? What happens if force is not parallel to the velocity of body and makes some angle ...
0
votes
1answer
9 views

Power - why do we use the driving force over the resultant force?

I'm an A-Level student, studying Further Maths. We've chosen the Further Mechanics as our optional module of the course. Further Mechanics, unfortunately, is not making a lot of sense to me, because ...
0
votes
2answers
35 views

How heavy would a counterweight to a pulley system have to be to allow a 150 pound human down from a height at approximately 5 mph?

I’m doing a science project (hypothetically speaking) that you can safely move a 150 pound human from the top of a height to the bottom safely with a pulley and an unknown weight. I’m trying to figure ...
0
votes
1answer
42 views

Problem in Mechanics [on hold]

How can one solve this question without using the work-energy theorem?
-1
votes
0answers
31 views

Movement Equation of a Particle in a Non Inertial System (polar coordinates) [on hold]

The problem: A particle of a mass $m$ is embedded in a circular rail, (radius: $R$), without any friction. In a given moment, the particle finds itselfs without velocity at point C, and a force is ...
-1
votes
0answers
14 views

A 25-kg box is pulled to the right on a rough, horizontal surface with a rope that makes an angle of 40 [closed]

(a) Draw a good FBD for the box. (b) What is the apparent weight of the box? (c) What is the magnitude of the friction force acting on the box? (d) What is the acceleration of the box?
2
votes
2answers
56 views

Roller coaster loop top speed

For a roller coaster loop, if it were perfectly circular, we would have a minimum speed of $v_{min} = \sqrt{gR}$ at the top of the loop where $g=9.8 m/s^2$ and $R$ is the radius of the 'circle'. ...
-2
votes
1answer
49 views

Magnetic force and field [on hold]

a student tried to make an electromagnetic compass  by suspending a coil or wire from a thread (with the plane of the coil vertical) and passing the current through it. she expected the coil to ...
0
votes
2answers
47 views

Are there two action-reaction pairs operating in a rocket

I'm confused about the action-reaction pair in a rocket. is it 1 The action of the explosion of gases in the combustion chamber on the rocket, and the reaction of the rocket on the gases, or 2 The ...