To some of these questions I can't find answers on the internet and to some I assume what the answer is but I'd still like to get a confirmation.
When I am not given the thickness of the plate, does that mean that the plate is intinitely thin?
What is the area of the sheet of charge when the...
I got the correct answers. Thank you very much for that. But, why my approach did not work? was it because the centripetal force is not a real force? just as with a car in a turn, the only force acting on the car is the friction force and no other force, so it would be wrong to write...
I don't understand why am I getting opposite answers. I get 250N for the lowest point and 750 for the highest point.
For the highest point: ##F_{net}=F_{cp}+F_{mg}-F_N## and then ##F_N=ma_{cp}+mg = 50*(25/5)+500=750N## because I've been told that ##F_{cp}## always acts towards the center of the...
It is exactly as posted. Although it is a translation, "in" which I posted refers to the period from 11th to 12th second. We do not have the word "at" in Croatian so it can be confusing sometimes, but if that was the case I would expect the author to write for "at the 12th second" something like...
In my textbook, one formula for power is P=W/t, where W=Fs and "s" is the path on which force is acting up on the object. In this case wouldn't that be the distance crossed? Assuming no friction, drag or losses of energy
yeah, but like, distance at the end of the 12th second or velocity at the end of 12th second, does it matter? if I have the formula for both and both should give back the same result?
Thanks, but can you explain to me why this formula works and the other one does not? But without calculus, just words.
Also, do you recommend I learn calculus first because I am getting really frustrated by having to guess which formula works and which one does not. And if so, up to what level...
Like, I do not know calculus, so I can't understand the reasoning behind it. So I am confused, which method shoud I use for instantaneous power P=Fv or P=Fs/t?
No, I want instantaneous power in 12th second. I didn't solve for average power here, I just typed the entire problem. I know how to solve for average, so that is not important. But I do not know how to solve for instantaneous power. I didn't learn calculus so I don't know what the symbols you...
Basically, I tried to find the solution by calculating P=Fs/t, where F= 2250 and s is the distance traveled in the 12th second and that result differs from the result I get when I calculate the power using P=Fv.
##F=ma=1500*1.5=2250N##
##s_{12}-s_{11}=...
Can someone please tell me where I am wrong?
I tried to solve the problem using velocity equation; ##v_{f}^2= v_{i}^{2} + 2as## and got a= 50m/s^2, F= 50 000N and therefore F=kx -> k=50 000N/m because dx=1.
But it's not correct. When I do it using conservation of energy I get 100 000N/m. Which...