Biomechanics - Kinematic Linear Concepts (Unit 3 AOS 1 Terms)

Question 1

Motion (the 4 motions)

Answer 1

Linear Motion:
The motion of a body along a straight or curved path (eg. skiing straight downhill with no rotation)

Angular Motion:
Angular motion is movement around an axis (internal or external). Caused by an eccentric force

General Motion:
Combination of linear and angular motion (eg. running)

Projectile motion:
When the body or an object leaves the ground.

Question 2

5 kinematic concepts

LINEAR MOTION

Answer 2

Distance
Displacement
Speed
Velocity
Acceleration

Question 3

Distance defintion

linear momentum

Answer 3

Measures the path traveled from start to finish regardless of direction

Question 4

Displacement

Linear motion

Answer 4

the difference between the initial position and the final position of an object.

Question 5

distance and displacment question

Displacement in the 400m race is 0m
What is the distance?

linear motion

Answer 5

400m

Question 6

speed def and equation

linear

Answer 6

The ratio of the distance covered to the time taken

Speed = distance / time

Question 7

velocity def and equation

Answer 7

the ratio of displacement to the time taken (has size and direction)
Velocity = displacement / time
The unit of measurement for both is m/s

Question 8

Accelerations in sport

Answer 8

Applying a force to a given mass will result in the acceleration of an object.

different types of acceleration
1. speeding up
2. slowing down
3. changing direction

Question 9

acceleration def and equation

Linear

Answer 9

• The rate an object is changing its velocity
• The change in velocity in a given period of time.

Acceleration = change in velocity / change in time

Question 10

3 types of accelerations

linear

Answer 10

1. Positive acceleration = getting faster (increased velocity)
2. Negative acceleration = slowing down (decreased velocity)
3. Zero acceleration = constant speed, rest and not changing direction. (0 velocity)