What force must be applied to lift the load?

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SUMMARY

The discussion focuses on calculating the force required to lift an 11.6 kg load using a lever with a fulcrum positioned 1.2 m from the load and 2.4 m from the applied force. Participants emphasize the importance of balancing both total vertical force and torque in the calculations. The fulcrum serves as a convenient reference point for torque calculations, where one distance is treated as positive and the other as negative. This approach simplifies the problem-solving process for lever mechanics.

PREREQUISITES
  • Understanding of basic physics concepts, specifically levers and torque.
  • Familiarity with the formula for torque: τ = r × F.
  • Knowledge of mass and weight conversion (using gravitational acceleration).
  • Ability to balance equations involving forces and torques.
NEXT STEPS
  • Study the principles of levers and mechanical advantage.
  • Learn about torque calculations in various contexts.
  • Explore the relationship between mass, weight, and gravitational force.
  • Investigate real-world applications of levers in engineering and physics.
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Students studying physics, educators teaching mechanics, and anyone interested in understanding the principles of levers and torque calculations.

Jtappan
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Homework Statement



A rod is being used as a lever as shown. The fulcrum is 1.2 m from the load and 2.4 m from the applied force. If the load has a mass of 11.6 kg, what force must be applied to lift the load?
____ N

fig-061.gif


Homework Equations



?

The Attempt at a Solution



When doing this problem do you need to put the rock as negative radius? or are you using two different equations?
 
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This is a simpler version of the last problem you posted. Read my response to that first. You have to balance both total vertical force AND torque. You can put the center to compute torques from anyplace you want, but the fulcrum is convenient. In which case, yes, one distance is positive and one is negative.
 

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