# 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.

11,375 questions
Filter by
Sorted by
Tagged with
48 views

### Unequal forces acting on two blocks connected by a string [closed]

Two blocks A and B are separated by some distance and tied by a string as shown in the figure. Find the tension in the string. I can see that maximum value $f_1$ can attain is $7 N$ and the maximum ...
59 views

### Vertical component of friction

If we have a car of mass $m$ sliding around a banked curve of angle $\phi$ with some coefficent of friction ${\mu}$, then the normal force will be $$Ncos\phi= mg + {\mu}F_{g}\sin\phi$$ But this ...
54 views

### Equilibrium of a body in torque problem

I was watching a video about torque in which the task was to find the force $F_2$ when a body is in equilibrium. The person in the video said that in order for the body to be in equilibrium, two ...
67 views

### Good Source to Understand Angular Momentum [duplicate]

I am looking for a good source to understand angular momentum. I know the basics but I am looking for a sound in-depth knowledge like directions of angular momentum, when it is not parallel to angular ...
72 views

39 views

### Friction at high speeds

I am reading a book which mentions that frictional force is not exactly proportional to the normal force at high speeds. Quoting: Once the bodies slip on each other frictional force is, $kN$. This ...
207 views

### What effect will a space-elevator have on Earth's rotational speed?

If you (or e.g. a skater) spin on the spot with your arms outstretched you spin at a given speed, but when you retract your arms you spin much faster, extending your arms again will slow the spin down....
33 views

### Gravitational two-body problem: Same period

Specifically in circular orbits of two stars around the center of mass: How can I show that the periods are equal?
90 views

### Derivation of the K.E. formula without the work-energy theorem (or proof of the work-energy theorem without the kinetic energy formula)

All of the derivations I have seen for the kinetic energy formula have relied on the fact that work is the change in kinetic energy, something like the one found here: How to prove equation of kinetic ...
139 views

### What happens when one uses a blender in zero gravity?

I was recently told by a friend that using a blender type apparatus in a zero gravity environment will act like a centrifuge instead mixing properly. Is this the case? Furthermore, can anyone provide ...
3k views

### How is angular momentum conserved for the orbiting body if the centripetal force disappears? [duplicate]

When the centripetal force on an orbiting body disappears (e.g. if it the body is a ball and the force was exerted by a string and the string rips, or, more unrealistically, if the body is the earth ...
187 views

### Circular motion with two particles attached: Seeking intuition

A narrow groove is cut along a diameter in the surface of a horizontal disc with center $O$. Particles $P$ and $Q$, of masses $0.2\,\text{kg}$ and $0.3\,\text{kg}$ respectively, lie in the groove, ...
69 views

### What are the equations of motion for a pendulum in $n$ dimensions?

Consider a pendulum formed of a light rod of length $l$ and a point mass $m$. At the pivot the pendulum experiences friction with coefficient $b$, and an agent can exert torque $\tau$. In 2 ...
67 views

### In non-uniform circular motion are centripetal acceleration and tangential acceleration independent of each other?

In non-uniform circular motion, the centripetal acceleration and tangential acceleration are perpendicular to each other, but does that mean that they don't affect each other because centripetal ...
104 views

### What if Newton's bucket had been a sphere?

My question involves a modification of Newton's bucket experiment. If a sphere filled (say) one-third or one-half with water is rotated very very fast, will the water eventually spread out across and ...
35 views

### Validity of Newton's second law in a non-inertial reference frame

Suppose two observers are mutually interact through gravitational force (assuming they are alone at space). If the reference frame is fixed in one of the observers could the observer in the reference ...
27 views

### Elastic (Young's) modulus and shear modulus derived from interatomic potential

Based on figure shown here, a theoretical elastic modulus can be derived by considering the interatomic potential and taking the derivative of the potential energy with respect to the distance (x-...
17 views

### (NLM) Find Acceleration of Both Blocks so that they won't lose their contact [on hold]

'a' and 'x' have numerical values. All pulleys are attached to some mass. Direction Of Acceleration is Right(+x axis)
69 views

### Newton's third law in magnetic in magnetic fields

Say I have a charged particle moving through a magnetic field perpendicular to it. It will experience a force, but according to Newton third law Every force has an equal and opposite reaction. So ...
136 views

### Why does pseudoforce act in opposite directions when we move from ground frame to the centre of mass?

In the solution of above question, they solved it by moving from ground frame to the frame of centre of mass. But we know that, to move from one frame to another ,we have to subtract the mass-...
53 views

### Ideal geometry for a shaft terminating thrust bearing

Following this PyDy example, I'm trying to understand the problem set 3.10 of the book: Kane, Thomas R., and David A. Levinson. Dynamics, theory and applications. McGraw Hill, 1985. page 272 (292 ...
42 views

### Do objects actually fall at the same rate? [duplicate]

The force of gravity takes the mass of both objects into account. For the sake of argument we are doing the experiment on the moon. The moon + the hammer have a greater combined mass than the moon ...
152 views

### How does conservation of energy work?

I understand that the law of conservation of energy states that energy cannot be created or destroyed, it can only change from one form to another. This means that the total energy before a certain ...
33 views

### Tangential Motion of an Object Attached by a Radial Elastic String [closed]

A toy car travels in a horizontal circle of radius 2a, kept on track by a radial elastic string of unstretched length a. The period of rotation is T. When the car is speeded up the string stretches ...
3k views

### Can human push Earth away from the Sun?

It's said the earth is approaching the sun. Can we push it away little by little? Although we can emit rocket towards the sun, but it's too expensive to make a rocket: So I think maybe we can ...
310 views

### The dynamics of a cornering wheel

Can a rolling wheel create a side force without first rotating on a vertical axis? There is something wrong with the way we describe how a cornering vehicle wheel creates a cornering force. I think ...
55 views

### Weight and Inertia (are they related?)

R. Feynman wrote in his lecture (The Feynman Lectures on Physics: Chapter-9) "Weight and inertia are proportional, and on the earth’s surface are often taken to be numerically equal, which causes a ...
### Is it possible to find $\mathbf{v}$ explicitly when $\mathbf{F}$ varies with $\mathbf{v}$?
I have the following problem (NO, this is not to ask for a solution to this problem). A block is placed on a plane inclined at an angle $\theta$. The coefficient of friction between the block and ...