Biomechanics – MCQs 50 Score: 0 Attempted: 0/50 Subscribe 1. Biomechanics is the study of: (A) Living organisms’ movement and forces (B) Chemical reactions in cells (C) Nervous system signaling (D) Genetic inheritance 2. The basic unit of force in biomechanics is: (A) Joule (B) Newton (C) Watt (D) Pascal 3. The lever system most common in the human body is: (A) First-class lever (B) Second-class lever (C) Third-class lever (D) Fourth-class lever 4. Torque is defined as: (A) Force × Distance (B) Force × Velocity (C) Mass × Acceleration (D) Work ÷ Time 5. The center of gravity of the human body in anatomical position lies approximately: (A) At the head (B) Near the sternum (C) In front of the second sacral vertebra (D) At the feet 6. Kinematics is concerned with: (A) Forces causing motion (B) Description of motion without regard to forces (C) Energy transformations (D) Stress-strain relationships 7. Kinetics deals with: (A) Description of movement (B) Forces that produce or change motion (C) Muscle anatomy (D) Heat transfer 8. Linear motion is also called: (A) Angular motion (B) Translatory motion (C) Rotary motion (D) Oscillatory motion 9. Angular motion occurs around: (A) A joint axis (B) The ground (C) The center of mass only (D) A straight line 10. Stress is defined as: (A) Force ÷ Area (B) Mass ÷ Volume (C) Velocity ÷ Time (D) Force × Distance 11. Strain is the measure of: (A) Energy absorbed (B) Deformation relative to original length (C) Force produced (D) Torque applied 12. Elastic materials follow: (A) Newton’s Law (B) Hooke’s Law (C) Pascal’s Law (D) Archimedes’ Principle 13. The slope of the stress-strain curve in the elastic region is: (A) Modulus of rigidity (B) Young’s modulus (C) Poisson’s ratio (D) Bulk modulus 14. Viscoelastic materials exhibit both: (A) Elastic and viscous behavior (B) Solid and liquid phases (C) Magnetic and electrical properties (D) Strength and weakness 15. The main function of tendons in biomechanics is to: (A) Connect bone to bone (B) Connect muscle to bone (C) Absorb calcium (D) Transport oxygen 16. Ligaments primarily: (A) Connect bone to bone (B) Store glycogen (C) Connect muscle to muscle (D) Transmit nerve impulses 17. The mechanical property of bone that resists bending is: (A) Compressive strength (B) Tensile strength (C) Flexural strength (D) Shear strength 18. Wolff’s Law describes: (A) Muscle contraction (B) Bone adapts to mechanical stress (C) Nerve impulse conduction (D) Fluid pressure in tissues 19. The gait cycle begins with: (A) Heel strike (B) Toe-off (C) Mid-stance (D) Swing phase 20. The swing phase of gait accounts for approximately: (A) 20% of gait cycle (B) 40% of gait cycle (C) 60% of gait cycle (D) 80% of gait cycle 21. The stance phase of gait is about: (A) 20% (B) 40% (C) 60% (D) 80% 22. Ground reaction force (GRF) is measured using: (A) Electromyography (B) Force plates (C) MRI (D) CT scan 23. The musculoskeletal system provides: (A) Protection only (B) Energy storage only (C) Support, movement, and protection (D) Hormone secretion only 24. An isometric contraction occurs when: (A) Muscle shortens (B) Muscle lengthens (C) Muscle contracts without changing length (D) Muscle vibrates 25. An isotonic contraction involves: (A) Constant muscle length (B) Constant muscle tension (C) Constant acceleration (D) Constant energy 26. Concentric contraction means: (A) Muscle lengthens under load (B) Muscle shortens under load (C) Muscle stays the same length (D) No contraction occurs 27. Eccentric contraction means: (A) Muscle lengthens under load (B) Muscle shortens under load (C) Muscle vibrates (D) Muscle remains relaxed 28. The mechanical advantage of a lever is given by: (A) Load ÷ Effort (B) Effort ÷ Load (C) Mass × Acceleration (D) Work ÷ Time 29. The patella increases the efficiency of: (A) Elbow flexion (B) Knee extension (C) Hip flexion (D) Ankle rotation 30. The study of fluid forces acting on the body is: (A) Thermodynamics (B) Hydrodynamics (C) Aerodynamics (D) Fluid mechanics 31. Drag force in biomechanics is caused by: (A) Air or water resistance (B) Gravity only (C) Muscle fatigue (D) Bone strength 32. Buoyancy is governed by: (A) Newton’s third law (B) Hooke’s law (C) Archimedes’ principle (D) Pascal’s law 33. Angular momentum is the product of: (A) Mass × Velocity (B) Moment of inertia × Angular velocity (C) Force × Time (D) Work ÷ Time 34. A sprinter’s starting block provides: (A) Frictional resistance (B) Stability and reaction force (C) Energy storage (D) Balance only 35. EMG (Electromyography) measures: (A) Muscle electrical activity (B) Bone density (C) Blood pressure (D) Oxygen levels 36. The law of inertia is described in: (A) Newton’s first law (B) Newton’s second law (C) Newton’s third law (D) Hooke’s law 37. Momentum is defined as: (A) Force × Distance (B) Mass × Velocity (C) Work ÷ Time (D) Mass × Acceleration 38. Impulse is equal to: (A) Force × Time (B) Force × Distance (C) Mass × Velocity (D) Energy ÷ Time 39. The moment of inertia depends on: (A) Mass only (B) Mass and distribution of mass (C) Velocity only (D) Force applied 40. The energy stored in a stretched tendon is: (A) Kinetic energy (B) Potential energy (C) Chemical energy (D) Thermal energy 41. Power in biomechanics is defined as: (A) Force × Distance (B) Work ÷ Time (C) Mass × Acceleration (D) Stress ÷ Strain 42. Muscle force production is influenced by: (A) Length-tension relationship (B) Velocity of contraction (C) Neural activation (D) All of the above 43. A first-class lever example in the human body is: (A) Biceps brachii (B) Triceps acting at the elbow (C) Gastrocnemius at the ankle (D) Quadriceps at the knee 44. A second-class lever example in the human body is: (A) Standing on tiptoes (B) Biceps brachii at the elbow (C) Triceps at the elbow (D) Neck extension 45. A third-class lever example in the human body is: (A) Triceps at the elbow (B) Biceps brachii at the elbow (C) Standing on tiptoes (D) Neck flexion 46. Shear force acts: (A) Along the axis of an object (B) Parallel to the surface of an object (C) Perpendicular to the surface (D) At 45° to the surface 47. Compressive stress in bones results from: (A) Pulling forces (B) Pushing forces (C) Twisting forces (D) Shear forces 48. Tensile stress in bones results from: (A) Pulling forces (B) Pushing forces (C) Twisting forces (D) Friction 49. Torsional stress results from: (A) Shear along parallel planes (B) Twisting forces (C) Pushing forces (D) Pulling forces 50. Biomechanics is important in: (A) Sports performance (B) Rehabilitation (C) Prosthetics and orthotics design (D) All of the above Molecular Biophysics – MCQsCellular Biophysics – MCQsMembrane Biophysics – MCQsNeurobiophysics – MCQsRadiation Biophysics – MCQsMedical Biophysics – MCQsComputational Biophysics – MCQsStructural Biophysics – MCQsBiophysical Chemistry – MCQsBioenergetics – MCQsBiomechanics – MCQsSystems Biophysics – MCQsBiomolecular Interactions – MCQsBiophysical Methods & Instrumentation – MCQsQuantum Biophysics – MCQsThermodynamics & Statistical Mechanics in Biology – MCQsBiophysics of Macromolecules – MCQs Electrophysiology – MCQsPhotobiophysics – MCQsNanobiophysics – MCQs