A 345 kg mass is supported on a wire attached to a 15 m long steel bar that is p
ID: 2250507 • Letter: A
Question
A 345 kg mass is supported on a wire attached to a 15 m long steel bar that is pivoted at a vertical wall and supported by a cable. The mass of the bar is 94 kg. (Take right and up to be positive.)
(b) A somewhat longer cable replaces the old and is attached to the steel bar 5.0 m from its upper end, connecting to the same place on the wall as before and maintaining the same angle between the bar and the wall. Find the tension in the cable.
*** Can anyone help with part b?
A 345 kg mass is supported on a wire attached to a 15 m long steel bar that is pivoted at a vertical wall and supported by a cable. The mass of the bar is 94 kg. (Take right and up to be positive.)Explanation / Answer
The cable is normal to the bar; use St = 0 about
the hinge
Use SF = 0
(a.)
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