Kinesiology Biomechanics quiz 2

Statics

Study of systems in a state of constant motion- Either at rest or at a constant velocity

Kinematics

Study of motion without regards to force.

Kinetics

Study of forces associated with motion

Angular Motion

Movement around a central point or axis or fixed point

Force

A push or pull action upon the body

Internal forces

Isometric, Concentric, Eccentric 

External forces

Gravity, wind resistance, water resistance

Compression force

Force that tends to shorten or squeeze

Tensile/Distraction

Stretch or pulling away of joint surfaces

Acceleration

Change in velocity divided by time

Mass 

The amount of matter in an object 

Force =? 

Mass x Acceleration 

Torque

Rotational effect of force

A levers force can be increased by either?

• Increasing the force applied 

• Increase the length of the forearm

Torque = ?

Force x Length of the forearm

Class one

Fulcrum is in the middle. Ex: Scissors, seesaw

Class 2

Load is in the middle. Ex Wheel barrow, the dirt in the middle is the load

Class 3: Most common lever type in the human body.

Effort is in the middle. Ex : Broom, Tongs, tweezers

Increasing stability 

Increase your base of support, or lower your center of gravity (COG)  

Class 3 body example 

Range of motion and force

Areas studied by biomechanist

Osteoporosis

Athletes body motion and angles

Bone density