BHK Biomechanics

Question 1

Newton's second law of motion as applied to biomechanics states that:

Accepted Answer

Force equals mass times acceleration (F = ma)

Answer

Newton's second law (F = ma) means the force applied to a body equals its mass multiplied by the resulting acceleration.

Question 2

In biomechanics, torque is defined as:

Accepted Answer

The rotational effect of a force about an axis, equal to force times moment arm

Answer

Torque (moment of force) = Force × perpendicular distance (moment arm) from the line of force to the axis of rotation.

Question 3

The center of mass of the human body in anatomical position is located approximately:

Accepted Answer

Just anterior to the second sacral vertebra

Answer

In anatomical position, the body's center of mass is typically located just anterior to the S2 vertebra, near the pelvis.

Question 4

Which type of lever system is most common in the human body?

Accepted Answer

Third class

Answer

Third-class levers dominate in the body because the muscle force (effort) acts between the fulcrum (joint) and the resistance (load).

Question 5

Ground reaction force (GRF) during normal walking has a characteristic double-hump pattern. What does each hump represent?

Accepted Answer

Heel strike and push-off forces

Answer

The two vertical GRF peaks correspond to the loading response at heel strike and the propulsive push-off at late stance.

BHK - Bachelor of Kinesiology Practice Test