Torque during running is produced by which type of motion?

Torque during running is produced by which type of motion?

• A. Rotary Motion
• B. Linear Motion
• C. Gravitational Influence
• D. Translational Energy

Answer: (A)

Torque is the rotational effect of a force about a joint axis, so it comes from rotary (angular) motion of the limb segments. In running, the leg doesn’t move only in a straight line; it rotates about the hip, knee, and ankle as muscles pull on tendons at a distance from these joints. That force creates a twisting moment that drives the limb through its arc and propels the body forward. Linear motion would be pure translation with no rotation about a joint axis, and translational energy describes energy from that straight-line movement rather than the rotation produced at the joints. Gravitational influence acts as a external force affecting posture and effort, but it isn’t the source of the rotational motion driving propulsion.

Torque is the rotational effect of a force about a joint axis, so it comes from rotary (angular) motion of the limb segments. In running, the leg doesn’t move only in a straight line; it rotates about the hip, knee, and ankle as muscles pull on tendons at a distance from these joints. That force creates a twisting moment that drives the limb through its arc and propels the body forward. Linear motion would be pure translation with no rotation about a joint axis, and translational energy describes energy from that straight-line movement rather than the rotation produced at the joints. Gravitational influence acts as a external force affecting posture and effort, but it isn’t the source of the rotational motion driving propulsion.