Mass and rod on fulcrum equilibrium problem. Balance point of mass and stick system on a fulcrum.

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Static equilibrium: rod and mass system.

In this mass and rod on fulcrum equilibrium example, we use net torque to compute the balancing point of a heavy rod and mass system. The stick and hanging mass balance point calculation is tricky, because we have to put in the distances to the hanging mass and the center of mass of the heavy stick as unknowns in terms of a variable x. When we balance torques, we are able to solve for x and find the balance point of mass and stick. After finding the balance point of mass and stick system, we apply the vertical force equation to compute the upward force exerted by the fulcrum for the static equilibrium mass and stick on pivot problem.

[防火长城]

thanks, couldn't find an example like this anywhere else

[hriktikkhan]

Thanks, buddy...helped me a lot...appreciate your efforts

[graysonparker]

Why is all of the mass factored as torque on the right side of the fulcrum? Wouldn't some of the mass be torque applied to the left side of the fulcrum? By this analysis, if the weight were on the right of the fulcrum and there was no rotational equilibrium, would there just be no torque at all on the left? Because that obviously is not the case...

[petergoh]

Can the force exerted by the fulcrum be downwards?

[jenelherrera]

in 3:53 where did the 120.1 come from?