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

The speed of joint rotation

Answer

The force produced by a muscle at a joint

Answer

The linear velocity of the center of mass

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

Projection angle

Answer

Initial projection speed

Answer

Height of projection

Question 3

The mechanical advantage of a lever system is calculated as:

Accepted Answer

Effort arm divided by resistance arm

Answer

Resistance arm divided by effort arm

Answer

Force multiplied by velocity

Answer

Speed ratio times efficiency

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

Step length

Answer

Stride length

Answer

Step time

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

Maximum stress before failure

Answer

Elastic deformation proportional to stress

Answer

Plastic deformation beyond yield point

Question 6

Which joint in the lower extremity acts as a primary shock absorber during the loading response of gait?

Accepted Answer

Knee

Answer

Hip

Answer

Subtalar joint

Answer

Metatarsophalangeal joints