Learning Goal:

To practice Problem$-$Solving Strategy $11\mathrm{.}1$ Equilibrium of a Rigid Body.

A horizontal uniform bar of mass $2\mathrm{.}5$ kg

and length $3\mathrm{.}0$ m

is hung horizontally on two vertical strings. String $1$ is attached to the end of the bar, and string $2$ is attached a distance $0\mathrm{.}65$ m

from the other end. A monkey of mass $1\mathrm{.}25$ kg

walks from one end of the bar to the other. Find the tension T$1$

in string $1$ at the moment that the monkey is halfway between the ends$$of$$the$$bar$.$