Oh. Then why can't we solve the first problem using angular momentum when treating the Atwood's machine as three different systems? Actually, isn't that what I did when I replaced m_1g and m_2g with T_1=m_1(g−a) and T_2=m_2(g+a), respectively. Consequently, for linear acceleration I got...
Ah that kind of makes sense. I'll sleep on it tonight. :)
One more question: can we solve the first problem using angular momentum like done above but treat the masses as different systems?
You can't solve the second problem using tension and choosing the entire Atwood's machine as the system...
That makes sense but this doesn't explain (at least not to me) why the torques are the forces of gravity and not the tension. I have no problem with the angular momentum part of the question, it's just the torques.
This was my first surmise but why didn't the tensions cancel in the second...
Hey everyone. I'm kind of stumped on this example from my textbook. It uses angular momentum to solve an Atwood's machine problem. Here is how the problem and the solution goes:
My question is, why does the book use force of gravity as the force acting on the pulley instead of the...
Oh wow I didn't think about the fact that if there is a hole, the pressure at the bottom of the tank (more specifically, the small hole) is not P=pgh. Thanks!
Hey I have a question on the derivation of Torricelli's Law. Bernoulli's Equation states the following:
Now let's say that the left side of the equation is the top of the tank and the right side of the equation is the bottom of the tank. The origin is at the bottom of the tank.
We can...
Hey everyone. So I was bored and I started swinging my ruler around my pencil (my ruler has a little hole where my pencil can be inserted into). Then I remembered we talked about why the ruler starts to go up the pencil if frequency increases in my physics class last year. The thing is, I can't...
Hi. When I took AP Physics last year, my teacher demonstrated the power of pressure by this object. It looked like a lid. It was rubber. You put the lid on a wooden desk, turn the nod on top of the lid, and try pulling the lid off the desk without sliding the lid. I forgot the name of this...
ok so the 200N is the force with friction. how am i suppose to find the force without friction? Isn't the force without friction greater than 200 if you think about it intuitively? If friction is not acting on the box, the only force acting on the box is the x-component of gravity; thus, F =...
Homework Statement
NO CALCULATOR ALLOWED.
a 50-kilogram box is pushed up a 1.5m-meter incline with an effort of 200 Newtons. The top of the incline is 0.5 meter above the ground. How much work was done to overcome friction?
(A) 55J
(B) 75J
(C) 245J
(D) 300J
(E) 490J
The inclination in the...
Hi everyone. I need help comprehending single slit diffraction. I am using the textbook: College Physics by Serway / Vuille 8th Edition. This is what it says:
"To analyze the diffraction pattern, it's convenient to divide the slit into halves, as in Figure 24.17 (picture below). All the waves...