I initially was trying to solve this with 9 unknowns, as I broke each tension into 3 unknown components. Now I see this is much simpler than I made it be. Thank you!
in static equilibrium all forces components and moments components must be 0, so all x,y,z of F and M must be 0 at any point on the system. in this case, since he showed that the equation for y-component of moments at A turns out to be 0=0, which isnt helpful to solve the problem . So whats left are the equations for x and z-component of moments at A.
The beam AB is fixed at the origin (0,0,0). When a beam is fixed, there are support reactions because the beam restricts translation. Because the beam is parallel to the Y-axis, we do not take a moment about it; Ax and Az are perpendicular to the beam, so therefore we find the reactions Ax and Az.
The sign has a mass of 100 kg with center of mass at G. Determine the x, y, z components of reaction at the ball-and-socket joint A and the tension in wires BC and BD shown in Figure 21.
I initially was trying to solve this with 9 unknowns, as I broke each tension into 3 unknown components. Now I see this is much simpler than I made it be. Thank you!
U just saved me I was getting 😁chowed so bad 👌
Thanks professor
I don't understand where the the Moments at the x and z came from? If there's a moment in the x-direction, how would the weight affect it?
in static equilibrium all forces components and moments components must be 0, so all x,y,z of F and M must be 0 at any point on the system. in this case, since he showed that the equation for y-component of moments at A turns out to be 0=0, which isnt helpful to solve the problem . So whats left are the equations for x and z-component of moments at A.
The beam AB is fixed at the origin (0,0,0). When a beam is fixed, there are support reactions because the beam restricts translation. Because the beam is parallel to the Y-axis, we do not take a moment about it; Ax and Az are perpendicular to the beam, so therefore we find the reactions Ax and Az.
Underated
I am now terrified
I have a question why Moment on y axis is equal to zero??
Tc and Td start at point which B which lies on the y-axis. A moment cannot happen if the force touches the line of action.
thanks
how are you coming up with 1/3 and 2/3 in tension
He is putting the x,y,z component of the unit vector and multiplying to the force.
@@C79284 thank you for replying to him even 4 months late. Here I am 3 months after you and you cleared it up for me!
The sign has a mass of 100 kg with center of mass at G. Determine the x, y, z components of
reaction at the ball-and-socket joint A and the tension in wires BC and BD shown in Figure 21.