- #1
amdma2003
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This is the problem I have with the question with a beam with mass.
A 2.90 -m-long, 390 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 71.0 kg construction worker stands at the far end of the beam. What is the magnitude of the torque about the point where the beam is bolted into place?
The equation that I used:
Torque = mgl
where
m = mass
g = 9.8
l = length
As provided by my professor.
Since the beam is bolted at the edge, and is horizontal, m=390, and l=2.9
In addition, there is a load applied to the edge of the beam so:
(390 + 71)9.8 * 2.9 = torque
Torque is 13101.62
However, that is wrong, can someone tell me why and what I am doing wrong? Thanks
Homework Statement
A 2.90 -m-long, 390 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 71.0 kg construction worker stands at the far end of the beam. What is the magnitude of the torque about the point where the beam is bolted into place?
Homework Equations
The equation that I used:
Torque = mgl
where
m = mass
g = 9.8
l = length
As provided by my professor.
The Attempt at a Solution
Since the beam is bolted at the edge, and is horizontal, m=390, and l=2.9
In addition, there is a load applied to the edge of the beam so:
(390 + 71)9.8 * 2.9 = torque
Torque is 13101.62
However, that is wrong, can someone tell me why and what I am doing wrong? Thanks