We've all seen it - that contraption with 5 metal balls hanging side by side on strings? You lift one to the side as if it were a pendulum, let it go, and it swings into the others - causing the ball on the very opposite side to go up. This is called Newton's Cradle, named after the big guy himself.
There are a number of physics laws at work here. First, the law of conservation of energy: as potential energy is maximized and kinetic energy is zero when the end balls swing to their highest poi
And on we go, talking about more physics in Newton's Cradle.
We already talked about conservation of energy, so now let's talk about conservation of momentum. Momentum is a vector quantity, meaning the direction it's in matters. When the first ball is dropped into the second ball, the second ball must keep moving in the same direction, and the first ball doesn't just bounce off the 2nd in the opposite direction; this would be a change in momentum, which cannot happen without the application o
See what I did with the title there? I'm so clever.
So, echos. An echo happens when you say something or make a noise and the sound waves from your mouth bounce off a hard surface and rebound back to you, which is why you hear what you said again and again and again. This is why echoes are common in caves, because you're surrounded by hard surfaces.
We know that when a wave reaches the end of its medium, it undergoes a certain process depending on how it's medium ends. Transmission/refrac
Since I just rode up one, and because I can't think of anything else to write about at the moment, I guess Ill do the generic elevator blog post.
So, elevators. One of the first things we did in Physics B when learning about free body diagrams, was practice elevator problems. First, in all out FBD's, we would have to draw our weight=mg pointing down because the force of gravity acts downward. Then the normal force, or the force of the elevator pushing up on your feet, would point upward.
Honestly, this whole E & M section of Physics C has not been going so great for me. We're supposed to have our last unit test on electromagnetism tomorrow, but I took it today because I won't be here tomorrow. We finish it the Monday after break, and it's safe to say I left about 75% of that test blank because I didn't know the answers.
I think I struggle with concepts more than anything. I just can't visualize the problem like I could in mechanics, so none of the processes we go through
