Torque Due to Weight Video Lessons

Concept

# Problem: Consider a rigid steel beam of length L = 14.5 m and mass m = 380 kg resting on two supports, one at each end. A worker of mass m, = 62 kg sits on the beam at a distance x from support A. Refer to the figureWhen the worker sits at a distance x = 2.5 m from support A, calculate the force, in newtons, that support B must exert on the beam in order for it to remain at rest. Use g with three significant figures

###### FREE Expert Solution

Torque:

$\overline{){\mathbf{\tau }}{\mathbf{=}}{\mathbf{r}}{\mathbf{·}}{\mathbf{F}}{\mathbf{s}}{\mathbf{i}}{\mathbf{n}}{\mathbf{\theta }}}$

At rest:

Στ = 0

Take counterclockwise torque as positive.

###### Problem Details

Consider a rigid steel beam of length L = 14.5 m and mass m = 380 kg resting on two supports, one at each end. A worker of mass m, = 62 kg sits on the beam at a distance x from support A. Refer to the figure

When the worker sits at a distance x = 2.5 m from support A, calculate the force, in newtons, that support B must exert on the beam in order for it to remain at rest. Use g with three significant figures