Biomechanics

Question 1

Biomechanics

Answer 1

Study of movement and forces of living things

Question 2

Statics

Answer 2

Study of systems that are in a constant state of

motion

Question 3

Dynamics

Answer 3

Study of systems in motion with acceleration

Question 4

Kinematics

Answer 4

Description of motion and includes

– E.g., displacement, velocity, acceleration

Question 5

Kinetics

Answer 5

Causes of motion
– E.g., force, torque, power, work, energy
(Kinetics are responsible for causing kinematics)

Question 6

Mechanical Advantage (MA)

Answer 6

Load (external/resistance force) divided by effort (muscle force) MA = Load/Effort (resistance/force)

Question 7

Effort Advantage

Answer 7

Using a relatively small effort to move a

much greater load

Question 8

Motion Advantage

Answer 8

Move one point of an object over a small distance
to result in a large amount of movement of
another point on object (i.e., body segment)

Question 9

Machines found in body

Answer 9

Three types: Levers, pulleys, wheels & axles

Question 10

Axis

Answer 10

Point of rotation

Question 11

Force

Answer 11

Effort

Question 12

Resistance

Answer 12

Location of external force

Question 13

1st class lever

Answer 13

Axis (A) somewhere between force (F) & resistance (R) (FAR) Teeter-totter

Question 14

2nd class lever

Answer 14

resistance (R) somewhere between axis (A) & force (F) (ARF) Wheelbarrow

Question 15

3rd class lever

Answer 15

force (F) somewhere between axis (A) & resistance (R) (AFR) Elbow joint/dumbbell curl.

Question 16

Torque

Answer 16

force x moment (lever) arm [force x distance]

Question 17

Lever Arm/Moment Arm

Answer 17

Perpendicular distance from the force to the axis of rotation.