A heavy iron bar of weight W is having its one end on the ground and the other on the shoulder of a

Question

A heavy iron bar of weight W is having its one end on the ground and the other on the shoulder of a man. The rod makes an angle $	heta$ with the horizontal. The weight experienced by the man will be\

Professor PC Thomas Classes · Answer

\ $\mathrm{R}_{1}$ is the reaction on the ground, $\mathrm{R}_{2}$ is the reaction on the shoulder. It will be $\perp \mathrm{r}$ to the rod if the rod projects at least a little over the shoulder. Taking moments about A , moment of $R_{1}=0$\ $\mathrm{R}_{2} 	imes \mathrm{l}=\mathrm{w} 	imes \mathrm{x}$\ $=\mathrm{w} 	imes l / 2 \cos 	heta$\ $	herefore \mathrm{R}_{2}=\frac{\mathrm{W}}{2} \cos 	heta$\