I talked to my teacher about it, and the answer she was told was this:
-The clipping at the top is the same as the voltage drop across Rc (8V)
-Then you know what the bottom clipping is because the value from 0 to the top clipping + 0 to the bottom clipping is the supply voltage (20V) which...
I really appreciate your help, but I still don't quite understand. I've read your explanation through a few times, but my knowledge is just so basic.
What determines the point at which they clip?
My year 12 exams are in 1 week exactly and I'm worried about a question (from last year's exam) that my teacher can't even answer. Each year they tend to repeat the difficult questions, and this was one of those.
I'll just give a summary of the question, and maybe you'll be able to answer my...
Great, I'm starting to get somewhere in my understanding of this. So is mg of the lower weight equal to the vertical component of the tension in the string? I need to be able to find out the overall force in the string while it's on an angle.
Now that I think about it, the teacher mentioned something about the tension being caused by this metal ball at the end of the string. When you spin the string, you actually hold on to this bit of hollow plastic that goes around the string. It's hard to describe, so here's an image.
Is...
If I wanted to prove that whilst spinning a ball attached by a string in a circle, that:
F = 4 * pi^2 * r / T^2
Where F = force from tension
r = radius
T = period of one rotation
Ie. Proving that:
F is directly proportional to r
F is directly proportional to m
F is direction...
Ah so is it because when he's braking, there is friction from the bike acting up the slope, which has a vertical component that adds to normal reaction force to give a higher upward force? Sorry, I know that's very wordy.
I hope I have this right :biggrin:
Homework Statement
A guy is riding a bike down a hill. He feels "lighter" when he accelerates than when he's braking. Why?
The Attempt at a Solution
I thought that a higher normal reaction force than weight was responsible for feeling "light". But this can't be right. Is it something to do...
Thanks everyone, I think I see what you mean.
My textbook says that work IS done. "In order to increase the velocity of the fluid, work must be done on the fluid traveling through the pipe to increase its kinetic energy. This can only occur if the pressure of the fluid entering the pipe is...
I'm doing an assignment on helicopter flight, and I'm a little confused about the Bernoulli principle. He said that if a pipe is bigger at the beginning and smaller at the end, the fluid traveling through the end of the pipe would have a lower pressure.
This seems counter-intuitive. I would...