Q1: 1. In a free-body diagram, what does a vector represent?

• A) Force
• B) Acceleration
• C) Mass
• D) Velocity

Q2: 2. Which of the following is true about free-body diagrams?

• A) They show the motion of an object.
• B) They only consider external forces.
• C) They include the internal structure of an object.
• D) They are only used in static situations.

Q3: 3. What is the purpose of drawing a free-body diagram?

• A) To show the internal forces within an object
• B) To visualize the motion of an object
• C) To identify and analyze external forces acting on an object
• D) To calculate the speed of an object

Q4: 4. Which of the following is a common step in drawing a free-body diagram?

• A) Include all internal forces
• B) Ignore friction forces
• C) Label forces with arbitrary names
• D) Draw all external forces acting on the object

Q5: 5. When drawing a free-body diagram, what should be the direction of the force vectors?

• A) Perpendicular to the object
• B) Parallel to the object's motion
• C) Randomly assigned
• D) Along the line of action of the force

Q6: 6. Which of the following is NOT a type of force commonly included in a free-body diagram?

• A) Tension
• B) Friction
• C) Internal forces
• D) Normal force

Q7: 7. In a free-body diagram, what does the length of a vector represent?

• A) Magnitude of the force
• B) Direction of the force
• C) Point of application of the force
• D) Type of force

Q8: 8. Which force is always present in a free-body diagram of an object on a flat surface?

• A) Tension
• B) Weight
• C) Normal force
• D) Friction

Q9: 9. When drawing a free-body diagram, which force should always be shown acting on the object?

• A) Tension
• B) Applied force
• C) Reaction force
• D) Weight

Q10: 10. What is the role of friction in a free-body diagram?

• A) To increase the speed of the object
• B) To reduce the normal force
• C) To oppose motion or impending motion
• D) To maintain equilibrium

Q11: 11. Which of the following is a common assumption made when drawing a free-body diagram?

• A) Ignoring the weight of the object
• B) Neglecting air resistance
• C) Considering only external forces
• D) Including all internal forces

Q12: 12. In a free-body diagram, what does the arrowhead of a vector indicate?

• A) Point of application of the force
• B) Direction of the force
• C) Magnitude of the force
• D) Type of force

Q13: 13. Which force is responsible for the upward support of an object on a surface?

• A) Friction
• B) Weight
• C) Normal force
• D) Tension

Q14: 14. When drawing a free-body diagram, what should you consider about forces at a point of contact?

• A) Ignore them
• B) Include them as internal forces
• C) Include them as external forces
• D) Analyze them separately

Q15: 15. Which force opposes the relative motion or tendency of motion between two surfaces in contact?

• A) Tension
• B) Weight
• C) Normal force
• D) Friction

Q16: 16. In a free-body diagram, what does a force vector represent in terms of Newton's laws?

• A) Velocity
• B) Acceleration
• C) Mass
• D) Net force

Q17: 17. When drawing a free-body diagram, what should be the size of the vectors representing forces?

• A) Proportional to the mass of the object
• B) Arbitrary
• C) Proportional to the acceleration of the object
• D) Proportional to the magnitude of the force

Q18: 18. Which force is always equal in magnitude and opposite in direction to the force of gravity?

• A) Tension
• B) Normal force
• C) Applied force
• D) Buoyant force

Q19: 19. In a free-body diagram, what does the size of a force vector indicate?

• A) The point of application of the force
• B) The direction of the force
• C) The type of force
• D) The magnitude of the force

Q20: 20. Which force is responsible for the tension in a rope or cable?

• A) Weight
• B) Friction
• C) Normal force
• D) Tension

Q21: 21. When drawing a free-body diagram, what should be considered when an object is in equilibrium?

• A) Include only vertical forces
• B) Include only horizontal forces
• C) Include both vertical and horizontal forces
• D) Ignore all forces

Q22: 22. Which force opposes the motion of an object through a fluid like air or water?

• A) Tension
• B) Weight
• C) Normal force
• D) Drag force

Q23: 23. In a free-body diagram, what should be considered when an object is accelerating?

• A) Include only static friction
• B) Include only kinetic friction
• C) Include both static and kinetic friction
• D) Include the net force

Q24: 24. Which force is responsible for the resistance encountered when trying to slide an object over a surface?

• A) Tension
• B) Normal force
• C) Weight
• D) Friction

Q25: 25. When drawing a free-body diagram, what should be considered about the direction of vectors?

• A) They should always be perpendicular to each other
• B) They should be in the same direction as the motion of the object
• C) They should be in opposite directions for balanced forces
• D) They should be randomly assigned