biomechanical principles of equilibrium

Question 1

Define static equilibrium

Answer 1

static equilibrium refers to an object or body not moving or rotating. All the forces and torques acting on the body or object must add up to zero.

Question 2

Define dynamic equilibrium

Answer 2

dynamic equilibrium refers to an object or body moving with a constant velocity - that is with no change in speed or direction is said to be in dynamic equilibrium.

Question 3

Define stability and balance

Answer 3

stability refers to the resistance to the disruption of equilibrium and balance refers to the ability to control equilibrium.

Question 4

Identify factors of stability

Answer 4

factors include: base of support, centre of gravity, body mass and friction between body and surfaces contacted.

Question 5

Define a first class lever

Answer 5

A first class lever refers to when the resistance and the force are on either side of the axis.

Question 6

Define a second class lever

Answer 6

A second class lever refers to when the resistance is between the force and the axis.

Question 7

Define a third class lever

Answer 7

A third class lever refers to when the force is between the resistance and the axis.

Question 8

Define the force arm

Answer 8

The Force arm is the distance from the axis to the force and the Resistance arm is the distance from the axis to the resistance.

Question 9

Define the mechanical advantage

Answer 9

The mechanical advantage refers to the ratio of the force arm to the resistance arm. Mechanical advantage = force arm/resistance arm.