Recent content by SkyrimKhajiit

Yeah, that's kind of what I was getting at but I wasn't sure if it was right.. But about the time, is it true that the period (actual period, i.e. seconds) stays constant even if the system does not involve a periodic motion? For example, Physics Classroom gives this graph and accompanying...

So basically we call this periodic motion because there are little to no real-life perfect examples in physics, but technically periodic motion involves no damping. ^Is that correct? Also, I wanted to clarify this passage: "The time it [mass on a spring] takes to complete one back and forth...

1. According to physicsclassroom.com, periodic motion is defined as "a motion that is regular and repeating." But the example included does not factor in damping (it's assumed that there's no air resistance and the spring will keep vibrating for eternity.)...

I know that work is the "dot product" of force and displacement, but I got a little stuck with this problem: "Vera is driving her 1000-kg car at a speed of 8m/s. When Vera slams on the brakes, the ground exerts an 8000-N frictional force to bring the car to a stop. Determine the initial kinetic...

Ah thanks for cleaning that up... But why is that? Is it because we have the component of cosine theta?

Hello, My physics textbook describes negative work in cases where the force and displacement act in opposite directions. But I don't understand how work would be negative in the formula: W = F • d • cos Θ If the angle theta is 180 degrees, then the result of the cosine of 180 degrees would be...

Hello, I recently posted a few conceptual questions regarding conservation of momentum. I'm processing the information more easily now, but I've hit yet another bump in the road. I've learned that in an inelastic collision in which "velocity is the same before and after the collision" the...

So I'm trying to learn the equations even though technically we haven't learned them. Would your first equation (m2Δv2=−m1Δv1) regard the change in momenta or the total momenta?

Sorry, just updated the reply

Thanks again. So let's say v1 was not 0. Let's say it was 2m/s and v2 was 6m/s. Would that mean that it would have to be mΔv=mΔv (with 1 and 2 subscripts - sorry I just looked up how to use latex lol :D)

Thank you! Now I've seen many people write v, not delta v. Is the v simply short for delta v, or is it actually velocity?

Sorry, I guess we had a bit of miscommunication... But wow, this explains it perfectly, thank you. And regarding the ball/Earth situation, just to make sure, momentum before the event=0, correct? Therefore, 0=p1+p2? (Let u=unknown units) So 0=10u+p2-->-10u=p2. Is that how to somewhat...

Thanks for the reply, I didn't imagine a thrower since the ball is coming out of the ground and there is recoil on Earth. I just don't understand what law says that there has to be an equal and opposite recoil (didn't say force --> third law). Would it have to do with impulse (F*t)? And the...

Hello everyone,I've been going through my school's freshman physics course pretty smoothly, but momentum seems to be a difficult concept for me to master. I understand all the equations and how the variables relate to one another, but we've gotten to the law of conservation of momentum and a lot...

Usually when we've done free-body diagrams with cars, the direction of friction was reasonably opposite the direction of the motion. But here it's different... 1. Homework Statement All I want to know is why the direction of friction is forward. My only guesses are that the wheels are...