Statics: free-body diagrams and equilibrium
Sharpen your statics fundamentals with focused practice on free-body diagrams and equilibrium. You’ll work through forces, moments, supports, and common constraint models across mixed difficulty. Grea...
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About this quiz
What you’ll practice
Build clean free-body diagrams (FBDs) and translate them into correct equilibrium equations for 2D and 3D statics. The focus is on identifying all external forces, moments, and constraints before you start solving.
Each question is multiple-choice with 4 options and no timer, so you can reason carefully and check your sign conventions. Choose your preferred question count and difficulty before you start to match your study time and confidence level.
Common pitfalls to avoid
Most mistakes come from missing reaction components, mixing up action–reaction pairs, or placing forces on the wrong body. Watch for distributed loads, equivalent resultants, and the difference between internal member forces and external loads.
How difficulty is balanced
The quiz mixes quick concept checks with longer multi-step setups, so you get both speed practice and deeper problem solving. Easier items reinforce core rules (ΣF=0, ΣM=0), while harder ones add combined loading, multiple supports, or tricky geometry.
Tips for better scores
- Isolate one body at a time; redraw the FBD even if a diagram is provided
- Label axes and positive moment direction before writing equations
- Replace distributed loads with an equivalent resultant at the correct location
- Confirm support models (pin, roller, fixed) and include the right reaction components
- Use ΣM about a point that eliminates unknown reactions whenever possible
- Sanity-check units and directions; a negative result often signals a reversed assumption
Sample questions
In static equilibrium, the sum of all forces acting on a body must equal what?
- A.Zero
- B.One
- C.The weight of the body
- D.The applied force
Which of the following is a common type of support in statics?
- A.Pinned support
- B.Hinge support
- C.Fixed support
- D.Cable support
What is a free-body diagram used for?
- A.To visualize forces acting on a body
- B.To calculate speed
- C.To design structures
- D.To measure distances
Quiz FAQ
How many questions are in this quiz?
This quiz has 126 questions on free-body diagrams and equilibrium in statics.
What format are the questions in?
Each question has 4 options and there is no timer, so you can work at your own pace.
Can I choose the number of questions and difficulty?
Yes. Pick your preferred question count and a difficulty setting before starting the quiz.
What topics are covered besides basic equilibrium?
Expect supports and reactions, moments, resultants of distributed loads, and multi-force setups that test clean FBD construction.
What are the most common mistakes this quiz targets?
Missing reaction components, incorrect moment signs, and placing forces on the wrong body are the most frequent pitfalls.
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