Hinged beam suspended at an angle

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AI Thread Summary
A 35.8 kg beam is hinged to a wall and supported by a cable at a 90° angle, inclined at 17.8° to the horizontal. The discussion focuses on calculating the horizontal component of the force exerted by the hinge and the force the beam exerts on the hinge. The approach involves applying equilibrium conditions for forces and torque, leading to the equations for the tension in the cable and the hinge forces. The solution reveals that the horizontal force from the hinge equals the horizontal component of the tension, while the vertical force balances the weight of the beam. The final calculations confirm the relationships between the forces in the system.
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Homework Statement


A 35.8 kg beam is attached to a wall with a hinge and its far end is supported by a cable. The angle between the beam and the cable is 90°. If the beam is inclined at an angle of theta=17.8° with respect to horizontal, what is the horizontal component of the force exerted by the hinge on the beam? (Use the 'to the right' as + for the horizontal direction.)

What is the magnitude of the force that the beam exerts on the hinge?

heres a picture: http://tinypic.com/r/141v7o6/6

Homework Equations



f=ma
t=Fr

The Attempt at a Solution



forces in the x dricection= 0
forces in the y direction= 0
net torque = 0

I think the tension can be found by L/2mgcos(theta)=LT
T=1/2mgcos(theta)

so the x component of the tension= x component of the hinge on the beam

Fx=Tsin(theta)The system is in equilibrium
Im unsure about how to approach this question because the beam is on an angle. An explanation with a worked solution would be very very much appreciated.
 
Last edited:
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nevermind, figured it out. for anyone doing a similar problem here's my sol'n

Fxhinge=Tsin(theta)
Fy=0=Tcos(theta)-mg+Fyhinge
Fyhinge=mg-Tcos(theta)

Fxhinge squared + Fyhinge squared = F hinge squared
 
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