Recent content by vs55

ok i got the answer it but I'm still kind of confused. The first formula stays the same, in the second formula V would just be 8 x 2 = 16 and 16 + (-2 x 2) = 12 which is the answer. My question is for the first formula i chose the current arbitrarily(clockwise), and if i chose it to go the other...

Homework Statement Use the superposition theorem to find Vo in the circuitHomework Equations The Attempt at a Solution i made 8A source 0 so the first equation using KVL becomes: 10i1 = -20 i1 = -2 then making the 20V source 0, the next KVL equation becomes: i think it's 5i2-8 = 0 i2 = 8/5 i...

dam can't believe i messed up that simple formula thx

Homework Statement Use mesh analysis to determine i1,i2 and i3 Homework Equations The Attempt at a Solution using mesh analysis i get rid of the 3A current source and the 1ohm resistor 1) -6 + 2(i1 - i3) + 4(i2 - i3) + 8i2 = 0 2) 2(i3 -i1) + 2i3 + 4(i3 - i2) =0 3)i1 + i3 = 3...

hmmm well i looked over my book, and it said if i multiply a row by k...i multiply the determinant by k...so when do we multiply the determinant by k?..cause what i did was that not multiplying a row by k(2)? and thanks for ur help guys

Homework Statement find the determinant using row operations: 1 -2 2 0 5 -1 2 -4 1 Homework Equations The Attempt at a Solution i took row 3 and took 2 x row 1 away from it to get : 1 -2 2 0 5 -1 0 0 -3 1 x 5 x (-3) = -15...but i multiplied a row by 2 so i should get -30...

Homework Statement Find the rank and nullity of the given matrix: |-2 2 1 1 -2 |----->(1) |1 -1 -1 -3 3 |----->(2) |-1 1 -1 7 5 |----->(3) The attempt at a solution i know rank is the number of non-zero rows and nullity is the # of columns minus the rank matrix: i took...

thx for ur help!

i got: -x + z =-3 -z +y = 1 -y + x = z to help set up the matrix: -x 0 z 0 y -z x -y 0 augmented matrix: -1 0 1 |-3 ---->(1) 0 1 -1 |1------>(2) 1 -1 0 |2------>(3) after some math: (1)/-1 (3)-(1) (3)+(2) 1 0 -1 | 3 0 1 -1 | 1 0 0 0 | 0 1x -1z = 3 1y...

this is the problem exactly as it was worded, but if u insist...i added "cars/minute" :| i also added the label on the intersections in the image A,B and C and sorry i thought the numbers were obvious :S, they represent the flow out that that arrow i'm guessing i have to go take away some of...

Homework Statement the following statement shows the traffic flow(in cars/minute) along 3 one way streets through the intersections A, B and C Set up and solve a system of linear equations(using the augmented matrix for the system) to help you find the flows x,y and z. Be sure to generate the...

hmm ok thanks i kind of get it now but the work that i posted in the first post, is it right? except for force in mass2( 2T1-m2a = 0) ofcourse so would my FBD show T1 to the right for mass m1 and 2T1 upwards for mass m2?

uhhh so are there 2 ropes or 1 rope?? if the system is not moving what is the equations for m2? is it 2T1 + T2 - m2g=0?

i'm still getting the wrong answer...the tension is messing me up

yes sorry the rope is supposed to be attatched to the mass not ramp so is T1 at the ramp = 2T1 at the hanging mass?