Sorry, but there's no figure.
If what I think is happening is happening, then you need to sum the torques around the pivot. The boom and the mass are trying to spin clockwise and the cable is pulling counterclockwise. You'll need some trig to find distances and components.
From that you can get tension. For the reaction forces sum all forces x and y. They all sum to zero.
A 1400-N uniform boom at ϕ = 70.0° to the horizontal is supported by a cable at an angle θ = 20.0° to the horizontal as shown in the figure below. The boom is pivoted at the bottom, and an object of weight w = 2250 N hangs from its top.
(a) Find the tension in the support cable.
kN
(b) Find the components of the reaction force exerted by the pivot on the boom.
horizontal component
kN right
vertical component
kN upward
i need help starting this problem
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