Pole Hinge
Pole Hinge
A 25.0 kg floodlight in a park is supported at the end of a horizontal beam of negligible mass that is hinged?
A 25.0 kg floodlight in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole, as shown in Figure P8.22. A cable at an angle of 30.0° with the beam helps to support the light.
image: http://www.webassign.net/sf/p8_22.gif
(a) Find the tension in the cable.
______ N
(b) Find the horizontal and vertical forces exerted on the beam by the pole.
horizontal
______N (to the right)
vertical
_______N (upward)
Sum torque about the hinge
25*g*L=T*sin30*L
T=25*g/sin30
The hinge has Fx=T*cos30
Fx=25*g/tan30
Sum forces in the y
Fy=25*g-T*sin30
Fy=0
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PV High Bar 5
