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PRACTICE · MEMBERSIntermediate · Single correct

PRACTICE / Static equilibrium

A couple changes the support share

A uniform 2 m horizontal beam weighs 60 N and rests on simple supports at both ends. A further downward load of 20 N acts 0.50 m from the left end. An applied counterclockwise couple has magnitude 10 N·m.

What is the upward reaction at the right support?

Organize the givens & assumptions
  • Beam weight: 60 N at midpoint
  • Extra load: 20 N at x=0.50 m
  • Counterclockwise couple: 10 N·m

Static equilibrium in a vertical plane; supports exert upward forces only; the couple adds torque but no net force.

  1. A35 N35\ \mathrm N
  2. B30 N30\ \mathrm N
  3. C40 N40\ \mathrm N
  4. D50 N50\ \mathrm N

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