Recent content by physicos

Steamking : I used w with rad/s ,so Δθ was in rad ! I should only use w with turns/min and leave time in minutes ! Thank you theAustrian !

I got your point , vertical and horizontal velocities were important in projectile motion , but in here how are we supposed to get the final velocity ?

TheAustrian, the dropout rate won't concern me , I was just stressed and overwhelmed with load of studies ! Watch me having an A in my physics ! I'm not dumb ! I just didn't understand what exercise asked and as you can see I had "basic" formulas , so no need to "monter sur tes grands chevaux "...

OHH ! I just realized ! SHAME ON ME ! I'M REALLY SORRY ! I'm more stressed than ever , and I have so much to handle ! I'm really sorry ! v=d/t so t= d/v ! It is evident that I'm aware of this ! just question of units would make me know it ! I'm so sorry agaain ! so t= 0.45s=7.5 *10^-3 min so...

I understood your points in 1 and 2 , but 3 ??

Well, I needed help in physics , not history... !

so , thinking about t = v*d = 730.2 s= 12.17 min ! and w= Δθ/t so Δθ=w*t= 1375,21turns ??

Well , for 1 and 2 : As you see , I did not use any value ,as it asks only for expressions ! and d is the distance gone through ! 3- It goes vertically ! it is on a table suspended 5° to the top !

Hi everyone , this exercise was given in one of my midterms , but we didn't correct it and I'm wondering where I went wrong on it : Help will be extremely appreciated : Here is the statement : A block of mass m=2 kg is pushed by a spring with a spring constant of k=650 N/m which is...

well vi= 40.5 m/s and ωi= 11.83 rad/s and d= 18.15m ! I'm thinking about using ωf²-ωi²= 2*α*Δθ and Δθ would be the number of turns ,i have ωi , how about ωf ? should I use ωf = vi/d ??

I've been looking for a link between what we learn in France in US and got an explanation , still,it is not helping me relate what they are asking for and what we have got as informtion

Well , I have already thrown a ball (thanks god) , but I come from a french institution , and we didn't use 'mph', 'ft', and 'rpm' or else , it was more : m/s , m , rad/s ! In France , we don't play baseball , so I don"t really know what pitcher and catcher are located or what they are supposed...

Ah ok , I got it ! Thank you SO MUCH !

FOR THE FIRST CASE : Kf+Uf=Ki+Ui so 1/2m*v²f+1/2*I*w²+mg*l*sinθ=1/2*m*v²+1/2*I*w² so It becomes : mg*l*sinθ=1/2*m*v²so l = v²/2*g*sinθ Is it correct now ?

The sphere has both rotational and transitional kinetic energy