1. Which of the following is an external force acting on the human body?
(A) Muscle contraction
(B) Gravity
(C) Ligament tension
(D) Tendon pull
2. Internal forces are mainly produced by:
(A) Wind
(B) Water resistance
(C) Muscles
(D) Friction
3. Which of the following is an example of external force?
(A) Friction from the ground
(B) Muscle force on a bone
(C) Ligament stretch
(D) Tendon pull
4. Which of the following is an internal force?
(A) Gravity
(B) Air resistance
(C) Muscle contraction
(D) Ground reaction force
5. Internal forces act:
(A) On the environment outside the body
(B) Between parts within the body
(C) Only on fluids
(D) On external objects only
6. Which of the following is an external force on a runner?
(A) Gravity
(B) Muscle tension
(C) Joint compression
(D) Ligament stretch
7. Which of the following is an example of an internal tensile force?
(A) Friction
(B) Muscle pull on a tendon
(C) Wind resistance
(D) Ground reaction
8. The ground reaction force is classified as:
(A) Internal force
(B) External force
(C) Muscular force
(D) Elastic force
9. The compressive force in the knee joint during squatting is:
(A) External
(B) Internal
(C) Air resistance
(D) Friction
10. Which of the following is NOT an internal force?
(A) Muscle contraction
(B) Ligament force
(C) Tendon pull
(D) Gravity
11. Air resistance acting on a cyclist is an example of:
(A) Internal force
(B) External force
(C) Muscle force
(D) Joint force
12. Which force causes body segments to move relative to each other?
(A) Internal forces
(B) External forces
(C) Frictional forces
(D) Pressure forces
13. A football player kicking the ball generates __________ in the leg.
(A) Internal forces
(B) External forces
(C) Gravitational forces
(D) Pressure forces
14. The weight of a person acting downward is an example of:
(A) Internal force
(B) External force
(C) Tension force
(D) Elastic force
15. Muscle pulling on a bone is an example of:
(A) Internal force
(B) External force
(C) Gravitational force
(D) Friction force
16. Which of the following is an external contact force?
(A) Muscle contraction
(B) Joint reaction
(C) Friction
(D) Ligament pull
17. Internal forces can be classified into:
(A) Gravity and friction
(B) Tensile and compressive
(C) Air and water resistance
(D) Drag and lift
18. When a bone is squeezed by two opposite ends, the internal force is:
(A) Tension
(B) Compression
(C) Friction
(D) Gravity
19. Which force is responsible for stretching tendons?
(A) External force
(B) Internal tensile force
(C) Frictional force
(D) Magnetic force
20. Which is an external non-contact force?
(A) Friction
(B) Gravity
(C) Normal force
(D) Air resistance
21. The push of the ground during walking is:
(A) Internal force
(B) External force
(C) Ligament force
(D) Muscle force
22. Which of the following best describes internal force?
(A) Force applied by the environment on the body
(B) Force generated inside the body
(C) Force due to air pressure
(D) Force due to water resistance
23. The stretching of ligaments during twisting of the ankle is an example of:
(A) Internal tensile force
(B) External friction force
(C) Gravitational force
(D) Normal reaction force
24. The normal reaction force exerted by a chair on a sitting person is:
(A) Internal
(B) External
(C) Muscle force
(D) Elastic force
25. Which of the following generates movement of body parts?
(A) Internal forces
(B) External forces
(C) Gravity
(D) Friction
26. Which force type maintains posture and balance?
(A) Internal muscular forces
(B) External forces
(C) Friction only
(D) Gravity only
27. During a push-up, the weight of the body is an:
(A) Internal force
(B) External force
(C) Joint force
(D) Tension force
28. Which of the following is NOT an example of an external force?
(A) Gravity
(B) Friction
(C) Air resistance
(D) Muscle contraction
29. When muscles contract, the force exerted on bones is:
(A) Internal
(B) External
(C) Friction
(D) Normal
30. The ground pushing up on a jumping athlete is:
(A) External force
(B) Internal force
(C) Elastic force
(D) Frictional force
31. Compressive forces in bones help resist:
(A) Stretching
(B) Bending
(C) Crushing
(D) Gravity
32. When the biceps muscle contracts, the force on the forearm is:
(A) External
(B) Internal
(C) Gravitational
(D) Frictional
33. Which of these is an external force in sports?
(A) Ground reaction force in running
(B) Muscle contraction in sprinting
(C) Ligament tension in joints
(D) Tendon pull on bones
34. Which force resists joint dislocation?
(A) External friction
(B) Internal ligament force
(C) Gravity
(D) Air resistance
35. The downward pull of Earth on a ball is:
(A) Internal force
(B) External force
(C) Friction force
(D) Elastic force
36. Muscle-generated forces that oppose gravity are:
(A) External forces
(B) Internal forces
(C) Contact forces
(D) Non-contact forces
37. A gymnast balancing on one hand experiences:
(A) External gravity force only
(B) External and internal forces
(C) Internal forces only
(D) No forces
38. Internal compressive force in cartilage prevents:
(A) Muscle pull
(B) Joint collapse
(C) Gravity acting
(D) Friction reduction
39. Which is a correct pair?
(A) Gravity – Internal force
(B) Friction – External force
(C) Ligament tension – External force
(D) Muscle pull – External force
40. The push of water on a swimmer’s body is an example of:
(A) Internal force
(B) External force
(C) Muscular force
(D) Tension force
41. Which force helps generate joint movement in the human body?
(A) Gravity
(B) Muscle internal force
(C) Friction
(D) Air resistance
42. Which of the following is NOT caused by external force?
(A) Joint dislocation
(B) Ligament strain
(C) Muscle contraction
(D) Falling due to gravity
43. The weight of a barbell in weightlifting is:
(A) Internal force
(B) External force
(C) Joint force
(D) Tension
44. The pulling of tendons during movement is classified as:
(A) External
(B) Internal
(C) Friction
(D) Normal
45. The resisting force within bones during compression is:
(A) External
(B) Internal
(C) Friction
(D) Elastic
46. During walking, the calf muscles generate:
(A) Internal forces
(B) External forces
(C) Friction forces
(D) Pressure forces
47. The wind pushing a cyclist backward is an:
(A) Internal force
(B) External force
(C) Frictional force
(D) Internal tensile force
48. The cartilage resisting shear stress is an example of:
(A) Internal force
(B) External force
(C) Gravity
(D) Air resistance
49. Which of the following is an external non-contact force?
(A) Gravity
(B) Joint compression
(C) Muscle contraction
(D) Ligament stretch
50. Which of these statements is correct?
(A) External forces arise from muscles and tissues
(B) Internal forces include gravity and friction
(C) Internal forces act within the body structures
(D) External forces act between body parts