$(2)$ Put $5$kg mass at left side $($at $2$m$).$ This is fixed throughout the experiment!

$(3)$ Try to balance by putting$5$kg mass at the right side.$$ Write the position of$$ the $5$kg mass.$$ Calculate the net torque.$$Torque$=$ mass $*$ g$*$length$,$and$$ the unit for torque$$ is N$.$m

$(4)$ Try to balance by putting$10$kg mass at the right side.$$ Write the position of$$ the $10$kg mass.$$ Calculate the net torque.$$

$(5)$ Try to balance by putting$20$kg mass at the right side.$$ Write the position of$$ the $20$kg mass.$$ Calculate the net torque.$$

$(6)$ What$$ do you conclude?$$