Static Trailer Diagram: Two Supports and a Point Load

Static Trailer Diagram: Two Supports and a Point Load

Original quantitative learning practice in English. All 24 questions are included. Four supplied cases exercise six related calculation targets; they form one topic, not four separate tests. Every question includes the complete initial data. Use the stated model and retain intermediate precision. Choose one answer. Learning target: 20/24, not an official pass mark. This bank covers the calculation topic in its title; it is not a complete professional examination, design approval or operating instruction.
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An ideal horizontal beam has two supports 7 m apart. A single downward point load 40 kN lies 2.5 m from the left support, inside the span. Ignore beam mass. Vertical reactions add to the load; moments about the left support give right reaction×span=load×position. This classroom model does not determine legal or safe trailer loading. Calculate the left-support reaction in kN. Keep intermediate values unrounded; round the final result to four decimal places if necessary.