BHK Biomechanics 2

Question 1

The term 'moment of inertia' in human movement refers to:

Accepted Answer

A body segment's resistance to angular acceleration

Answer

Moment of inertia (I = Σmr²) quantifies how mass distribution about an axis resists changes in rotational motion.

Question 2

During projectile motion in sports, which factor does NOT influence the range of a projectile (ignoring air resistance)?

Accepted Answer

Mass of the projectile

Answer

In the absence of air resistance, range depends on angle, speed, and height of projection but not on the projectile's mass.

Question 3

The mechanical advantage of a lever system is calculated as:

Accepted Answer

Effort arm divided by resistance arm

Answer

Mechanical advantage = effort arm / resistance arm; a value >1 means the system amplifies force but reduces speed.

Question 4

Which gait variable is defined as the time elapsed between two consecutive heel strikes of the SAME foot?

Accepted Answer

Stride time

Answer

Stride time is the duration of one complete gait cycle, from heel strike of one foot to the next heel strike of that same foot.

Question 5

In a tensile stress-strain curve for biological tissue, the 'toe region' represents:

Accepted Answer

Straightening of collagen crimp with low stiffness

Answer

The toe region reflects the initial uncrimping of wavy collagen fibers before they become taut and bear load linearly.

BHK - Bachelor of Kinesiology Practice Test