Recent content by Tibriel

Took a video with my phone but it keeps telling me the file is too large when I try to upload it.

Here is what I came up with but I’m dubious of how valid the solution is since the torques are calculated about different points.

So I've done this by using a dry erase marker as a stand in for the box. At low speeds the marker can slide to a stop. But go too fast and the marker tips once the friction goes from kinetic to static.

Homework Statement Not an actual homework problem but a discussion that came up in class while we were learning about torque. A tall box is sliding across a surface with friction f, mass m, and velocity v. What equations would you use to figure out if the box would tip over while sliding to a...

So I heard that one of the neutrons will decay into a proton because a nutrino comes along and gives the neutron a W boson. This turns one of the down quarks in the neutron into an up quark and additionally the nutrino becomes an electron (because it lost the W boson). So would it be right to...

Yes, you are spinning the object in a horizontal circle, on Earth. So I would imagine that g definitely plays a role in the solution. x is described in the original post as the angle the string makes to the vertical. Just imagine spinning something in a horizontal circle over your head. I...

Homework Statement You spin a 1.20 kg mass at the end of a 1.10 m string. The tangential velocity is 13 m/s. What is the tension in the string? Homework Equations x = angle string makes to the vertical L = string length r = L*sin(x) T*cos(x) = mg (because the sum of the vertical forces has...

Homework Statement person and a box of equal masses are hanging off of the same pulley. The rope is considered massless. The person and the box are separate from each other. (The person is NOT standing on the box.) Homework Equations How far does the box move if the person starts climbing...

Hi All, I get that one object can't travel faster than light with respect to another object because of SR and length and time contraction. What I don't get is how this meshes up with expanding universe. If the space between 2 objects is expanding then wouldn't two objects be accelerating...

How much of Earth's Tides is caused by the rotation Moon and Earth around an axis and the Earth Orbiting the Sun? I've seen tides explained both the way everybody talks about it above as well as describing it as an effect of the inertia from the rotation, or what people mistakenly call...

Conservation of Momentum vs. Energy in "sticking" collisions Homework Statement So here's the deal I'm wondering why when you have a collision where the two objects stick together momentum is conserved but energy isn't. (or at least that's how I'm reading what my math is telling me)...

So the latest i read was that the sky is blue because that is the color of air, just like water is blue for the same reason. Now this short article i read also claimed that sunsets are red because of some property of light that causes it to show different colors when it transmits light as...

OK so let me see if i understand everything, when you poke a hole in the bottom of a container of water (as long as the hole is not small enough to disrupt flow due to its size) then the exit velocity of the water is directly proportional to the current pressure. And nozzles work by reducing...

So I know that F = P*A When you put a nozzle on a hose the area is smaller so does the pressure increase and the force stay the same, does the pressure stay the same and the force increase, or do they both change? Also if you poke a hole in the bottom of a bucket full of water will the...