Basic Biomechanics

Question 1

Define biomechanics.

Answer 1

Applying the laws of mechanics to biological organisms

Question 2

Define kinetics

Answer 2

Study of forces (gravity/friction/pulling)

Question 3

Define kinematics

Answer 3

Description of motion in relation to space and time

Question 4

What are the types of forces in the body?

Answer 4

1. Concentric
2. Eccentric
3. Isometric

Question 5

Describe concentric force.

Answer 5

Muscle shortens towards the centre

Question 6

Describe eccentric force.

Answer 6

Muscles lengthen from the centre

Question 7

Describe isometric force.

Answer 7

Tension when a muscle is static

Question 8

Define statics.

Answer 8

Branch of biomechanics concerned with bodies at rest and forces in equilibrium

Question 9

Define torque.

Answer 9

Force acting at a distance from an action of rotation.

Question 10

Formula for force.

Answer 10

Force = mass * acceleration
F = m*a

Question 11

Formula for moment (torque)

Answer 11

Moment = Force * Perpendicular distance from axis
M = F*d

Question 12

Describe a class 1 lever.

Answer 12

Pivot lies between the applied force and the resistance

Question 13

What is an example of a class 1 lever in the body?

Answer 13

In the neck when raising head

Question 14

Describe a class 2 lever.

Answer 14

Resistance lies between the pivot and the force

Question 15

Give an example of a class 2 lever in the body.

Answer 15

Standing on tip toes

Question 16

Describe a class 3 lever.

Answer 16

Force lies between the resistance and the fulcrum

Question 17

Give an example of a class 3 lever in the body.

Answer 17

The elbow joint