Share
Explore BrainMass

Forces and Moments Effects

Problem:
Problem:
a. what is the force acting through (F) required to hold the lever in static equilibrium? Indicate clearly the Force and resistance vectors due to the weight, the force moment arm and the resistance moment arm, as well as the axis. Note that the weight is 40 kg and gravity is g=9.81 m/s2.

b. What would be the effect if the force increased 2 folds? Is static equilibrium maintained while the moment arms remain constant, as presented in (a)? Draw a figure and explain.

c. What is the net (combined) moment created in figure (a) if the resistance is now 122 Kg, and the force acting through F is 200 N? Is it clockwise or counterclockwise? Moment arms are constant for the force and the resistance.

d. what class of lever is represented in (a) as indicated by the three main components: Force, resistance and axis? in your opinion, what is the mechanical advantage of this system? Is it in favor of speed or strength?

Tip from the professor:
Mechanical advantage(MA)= load/torque, or Resistance/force, or force arm/resistancearm
You have the force arm and the resistance arm. That should give you the MA and a smallresearch should indicate if the value obtained favors speed or strength (force)

Attachments

Solution Preview

Please see the attached file.

In case of any confusion or doubt may contact again.

Thanks

OO I did not saw the d part as it ...

Solution Summary

The forces and moments effects are examined.

$2.19