Biomechanics

Question 1

Kinesiology

Answer 1

The study of human motions as it pertains to physical activity

Question 2

Newton’s first law

Answer 2

Inertia

Question 3

Inertia

Answer 3

“Reluctance to change”
A body at rest will remain at rest + a body in motion will remain in motion unless acted upon by an external force

Question 4

Measure inertia by

Answer 4

Looking at the mass
Centre of mass (centre of gravity)

Question 5

Centre of mass

Answer 5

Point around which body’s weight is distributed
Balance point of the body- distribution =balance

Question 6

Velocity

Answer 6

A body in a constant state of movement (stillness or movement)
Stillness=velocity 0

Question 7

Change in velocity

Answer 7

Acceleration (positive, negative or zero)

Question 8

Force

Answer 8

Cause (push or pull) that produces a change in the state of rest or state of motion
Where you apply force causes different kinds of motion

Question 9

4 kinds of motion

Answer 9

Non- motion
Linear motion
Rotational motion
Motion to stability

Question 10

Non-motion (static or stability) where is centre of mass

Answer 10

Centre of mass must be over bass

Question 11

Linear motion (where is force applied)

Answer 11

Force applied to the centre of mass create linear displacement/movement

Question 12

Rotational motion

Answer 12

Force applied off centre of mass, the more off centre the force the greate the rotation and the less linear displacement.
Rotational force is influenced by both the force and the the force applied away from the axis of rotation.

Question 13

Motion to stability

Answer 13

Motion to absorb energy
Over as much time and body surface as possible

Question 14

Forces=torque=muscle contractions

Answer 14

Muscle shortens
Rotates more of one joint
Ex. Bicep shortens, elbow rotates