Give an example, of a way I can calculate impact force in a system in which force is not constant.

Thanks.]]>

Sam, whose mass is 75 kg, stands at the top of a 12-m-high, 100-m-long snow-covered slope. His skis have a coefficient of kinetic friction on snow of 0.07. If he uses his poles to get started, then glides down, what is his speed...

Speed and Kinetic Friction]]>

Both containers are just equal in volume and having same height; you can assume one is upside down of another. What is pressure at the bottom of the containers. Lets say left side is container 1 and one on right side is 2.

Pressure is equal or force is equal at the bottom?]]>

Juno/JunoCam mission]]>

Best,

Gimblestitch]]>

You push a 10 kg box up a rough ramp at a constant speed of 2 m/s.

uk=0.4

Theta=15

vi-vf=0 since constant which means a=0

Questions are

a. What is the rate at which you do work on the box? b. What is the rate at which...

Power constant, box up ramp]]>

Problems with Self-Studying

...

Problems with Self-Studying - Comments]]>

For example, is there a...

Simplifying the factors of a complex number's imaginary part]]>

alternate uses for rail gun technology]]>

The static co-efficient of friction between a football blocking sled (90 kg) and grass is 0.56. (i) If an80 kg coach stands on top of the blocking sled, what is the maximal static frictional force?(ii) Will the dynamic...

Dynamic coeffecient of friction Problem]]>

It was Feynman (as he is one of mine along with Von Neumann and Lev Landau).

He has done an interesting post about Feynman's teaching:

https://www.gatesnotes.com/Education/The-Best-Teacher-I-Never-Had

Feynman was a great...

Bill Gates On Feynman]]>

Tensor formalism in GR]]>

Find all extrema and inflection points of the function ## y = \frac {x} {ln(x)} ##

I did the first and second derivative by hand, and they worked out in CAS as well...

## y = \frac {x} {ln(x)} ##...

Extrema and Inflection Point]]>

[tex]r''(t) = -\frac{G\cdot M}{r(t)^2} + r(t)\cdot{\theta}'(t)^2 - \frac{3\cdot G\cdot M\cdot{\theta}'(t)^2}{c^2}[/tex]

[tex]{\theta}''(t) = -2\cdot...

Schwarzschild equation of motion: initial conditions]]>

Every image of every star has...

The terrible distortions of the Hubble Telescope]]>

]]>

Hi guys! I'm new Rohit and I'm new here]]>

I'm working on a raytracer, and got stuck with trying to model a lens analytically.

Given is a thin lens at position p with the axis n, radius r and a focal distance f, a ray hits it at position p1 going in the direction d.

Which way would the ray be going on the other side of the...

Ray transformation of a 3d lens?]]>

EM Phenomenon: Magnetism from a Cathode Ray?]]>

First of all, before trying some simpler latex codes in the site, how can I try them in a different environment to see whether or not they work? For example I want to copy and past this [[itex, F_T,...

Latex learning help]]>

What happens when tidal power runs out?]]>

Hi

Calculate the forces F1, F2, F3. F1 is the force on the red wall. F2 is the force on the black center and F3 is the force from springs on the red center. Calculate the torques T1 from F1 and T2 from F2 and give the...

Calculate a torque from a pressure]]>

[tex] \frac{dx}{dt} = \frac{-k}{x^5(56-y^8)^{9/2}}(85+y^{5} + y^{6}) [/tex]

[tex] \frac{dy}{dt} = \frac{-k}{x^4(56-y^5)^{7/2}}(44+y^2) [/tex]

Let's say I have the initial conditions. What numerical method someone could use to...

Numerical methods for system of ODES]]>

How does Superman fly? Does he emit gravitons or does he control the spacetime curvature since he doesn't have any jet or wind based propulsion system?]]>

Does the ionic background of a crystal affect the index?]]>

if something like in movie (or in novel) really happen.

if state were to spend a several billion to rescue one single man form mars.... are they gonna do it?

or is it possible for them to keep silent and let the mars kill him to save money?

I...

I just watched the movie The Martian, is it possible?]]>

For simplicity assume an [x y z] coordinate system with the origin in the center of the galaxy and [x y] representing the plane of rotation. At any point [x y z] there is a corresponding velocity vector...

Galactic Rotation Data in 3D]]>

I felt I struggled quite a bit getting through the first two semesters I got two C's last semester and I felt I did...

Dealing With Large Course Load]]>

Here is the last page of part 4. https://www.physicsforums.com/threads/random-thoughts-part-4.786642/page-201]]>

We flip a symmetric coin. The equations of movement are deterministic, but the

Explaining Probabilities in a deterministic world]]>

Hi, Just made a small thought experiment on the train, haven't really thought about it in depth. I was just wondering, if I created the above scenario (open circuit secondary and a voltmeter), would I get a voltage (assuming there is a difference in turns for primary...

Find TX turns ratio and 'class' questions?]]>

How is it that mathematics describe reality so well?]]>

Thank you]]>

"Scientists' consensus is that a layer of liquid water exists beneath Europa's surface, and that heat from tidal...

Implications of life being found or not found on Europa]]>