Recent content by zvee_y

In RC circuit, what is the mathematic relationship between the time of charge or dischare and the capacitors ? time of charge or discharge andn the resistances? I know that as the capacitor or the resistance is increased, the time it take to charge is also increase as well. But I am not sure...

Thanks. I did fixed the picture. Can anyone please help me out?

I've attached the problem in this post, so that's way yall can see the problem and picture easily. The Attempt at a Solution what is this signal \sum means in the problem? THe problem said they find the ammeter in the cirucuit read 2A, I just wonder is it the total current? If i set up...

Thank you. So the problem initially as the picture shown? and moving up? I didn't look at the problem like that from the beginning.

no i posted wrong. F/m , a=3.66 . but the answer wasn't right though. should it be negative?

Ok so Fnet=19.776. Then divide by x=0.144 (from a) and that's the acceleration ?

\hat{x} what is that mean

spring forces keep it up and gravity force move it down. So it is in opposite directition. Isn't it?

What is I.e. ?

I found fs=-39.6 so Fnet=mgsin22-(-39.6)=59.424. Find acceleration from ma equation. But it doesn't make sence, because the block is moving down, so the spring force must be smaller than the gravitational force acting on it.

YESS a is solved. So on b, use Fnet=Fspring - mgsin22 = ma. Find acceleration from that? But since they ask for acceleration at its lowest point. So i don't think it right though

is h=xsin22 ?

but to set up the equation mgh=(1/2)kx^2, i need to know h, it ain't give h in the question.

Guyss...help me w/ this one, please!

hehe Thank you. I think i got it. Just never think about that equation you know. Thanks a lots. Yes now i even understand more through DIck's explanation. mg(h+x)=(1/2)kx^2*23 hhehe...i totally got it now.