Recent content by koolkris623

  1. K

    Calculating Pressure from Stacked Bricks: Fluids Homework Solution

    Homework Statement A brick weighs 15.0 N and is resting on the ground. Its dimensions are 0.203 m 0.0890 m 0.0570 m. A number of the bricks are then stacked on top of this one. What is the smallest number of whole bricks (including the one on the ground) that could be used, so that their...
  2. K

    Finding the Normal Equation for a Curve at a Given Point

    Find the equation of the line normal to the curve at (0,0). (Normal lines are perpendicular to the tangent lines) 2y + sinx = xcoxy I found the derivative to be (cosy - cosx)/ (2+ xsiny) then the slope tangent is 0...then the slope perpendicular to it is undefined...so then is the...
  3. K

    Equation of Tangent Line for Curve at (5,-3)

    wait if its a circle then why isn't the equation x = 5?
  4. K

    Equation of Tangent Line for Curve at (5,-3)

    Find the equation of the line tangent to the curve at (5, -3) (x-2)^2 + (y+3)^2 = 9 I solved the derivative to be dy/dx = ((-2x+4)/ (2y+6)) when i plugged in the points (5, -3) I got the slope as -6/0...How is this possible?? How can i find the equation of this curve if the slope is...
  5. K

    Determine (dy/dx) using implicit differentiation

    Determine (dy/dx) using implicit differentiation. cos(X^2Y^2) = x I'm really confused what to do now..i think the next steps are: d/dx [cos(X^2*Y^2)] = d/dx [x] = -sin(X^2*Y^2)* ((X^2*2Y dy/dx) + (Y^2*2X)) = 1 = -2YX^2 sin(X^2*Y^2) dy/dx + -2XY^2sin(X^2*Y^2) = 1 = -2YX^2 sin(X^2*Y^2)...
  6. K

    Calculate Torque & Force on Beam in AP Physics B

    oh hahaha i c the mistake lol i wasnt reading properly thanks for EVERYTHING!
  7. K

    Calculate Torque & Force on Beam in AP Physics B

    can you explain to me what the website did that i didnt..cause i need to know how to do this for a test Correct Ans: 29072.0130875 N for tension Sum of forces = 26682.98896
  8. K

    Calculate Torque & Force on Beam in AP Physics B

    ok i got the correct answers using the website you gave me
  9. K

    Calculate Torque & Force on Beam in AP Physics B

    Doc Al...I can't do it again..cause i only have one more trial left cool ill try the site
  10. K

    Calculate Torque & Force on Beam in AP Physics B

    ya but then didnt i do the problem right...it says I am not getting the correct answer...so I am lost and i have only one try left
  11. K

    Calculate Torque & Force on Beam in AP Physics B

    ETorque = 0 Fl(D) + Wb (.5 D) - Ty(D) = 0 12.0E3N(4.60 m) + 4.50E3N(2.75) - Ty(6.069m) = 0 i used it here.....^ the T is for the cable that's added to the beam
  12. K

    Calculate Torque & Force on Beam in AP Physics B

    they gave the length of the beam..5.5 m
  13. K

    Calculate Torque & Force on Beam in AP Physics B

    that is the length of the cable..i did 5.5 / cos25
  14. K

    Calculate Torque & Force on Beam in AP Physics B

    A uniform steel beam of length 5.50 m has a weight of 4.50 103 N. One end of the beam is bolted to a vertical wall. The beam is held in a horizontal position by a cable attached between the other end of the beam and a point on the wall. The cable makes an angle of 25.0° above the horizontal. A...
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