Recent content by roughneck84

anyone ??

the time given was 0.35 s. Do i just pick a anumber like 0.1 for the time it was in the cannon ??

somewhat. we learned trigonomic method. cosine law and pathagorean theorem

I am having problems with part B of the following question. A human cannonball with a mass of 70 kg experiences an impulse of 4000 N/s for 0.35 s a) Calculate the force acting on the human cannonball. This is my sol'n: J = 4000 N/s (delta)t = 0.35 s J = F(delta)t 4000 N/s = F(0.35...

I have been torturing myself with this problem for a couple weeks now and I am stumped. The unit I am working on is called simple harmonics. The question is: Prove that the maximum speed (Vmax) of a mass on a spring is given by 2(pi)fA I am guessing that the question wants me to re-arrange one...

well explained I understand thank you very much

originally i thought that was what i do. however i run into a problem when i do that. If Et = Ek and Ek= 1/2mv^2. If i look at the formula i should get 1900 J = 1900 J + 1/2kx^2. 1900 J - 1900 J = 1/2kx^2 0 = 1/2 kx2 i can't have a 0 divided by 1/2k

Et = 1/2mv^2 + 1/2kx^2 I think i get it. I use the value above that I calculated for Ek, put that as Et in the formula then isolate to solve for x.

Potential energy ? so would Ek=Ep ? from there how do i find the distance that the spring travelled?

so in this question Ek = Ep? from there where do i go to find the distance traveled by the spring?

Potential energy ?

the law of conservation states that energy cannot be created or destroyed. Would i calculate the potential energy of car 1 and add it to the kinetic energy of car 2?

[SOLVED] Plz help w/ Simple harmonics question I am doing simple harmonics and running into problems. The formulas given for simple harmonis in my book are f=[1 / 2(pi)]square_root (k /m) or f=[1 / 2(pi)]square_root (a /-x). The question reads: Car 1 has a...