Linear Kinematics

Question 1

What is kinematics

Answer 1

the study of motion exclusive of the influences of mass and force. With regard for the forces acting on a body

Question 2

Kinematics is the branch of biomechanics that deals with the description of the ___ and ____ components of motion

Answer 2

spatial and temporal

Question 3

What are 3 measurements in kinematics

Answer 3

Displacement
Velocity
Acceleration

Question 4

What are 3 types of mtion

Answer 4

linear
angular
general

Question 5

What is linear motion

Answer 5

Uniform motion of all parts of an object in the same direction at the same speed (aka translation)

Question 6

What is straight line linear motion

Answer 6

rectilinear

Question 7

What is curved line linear motion

Answer 7

curvilinear

Question 8

What is angular motion

Answer 8

Rotation around an axis. D

Question 9

In angular motion. Different parts of the object undergo different _____ displacement

Answer 9

linear

Question 10

In angular motion, all part of the object undergo the same ____ displacement

Answer 10

angular

Question 11

What is general motion

Answer 11

a combination of linear and angular motion

Question 12

In order to measure motion we need to consider ___ and ____

Answer 12

space and time

Question 13

How is position measured

Answer 13

as the location within a fixed coordinate system

Question 14

how do you describe the position of an object in space

Answer 14

Need to have a landmark
Need to know basis of measure
Need a coordinate system

Question 15

An sxis system is normally defined as _____ reference axis

Answer 15

perpendicular

Question 16

What is the polar coordinate system

Answer 16

two dimensional coordinate system in which each point on a plane is determined by a distance from a reference point and angle from a reference direction

Question 17

In image analysis the coordinate system normally relates to the…

Answer 17

visual field of an image and involves a calibration of image pixels to actual units of measurement

Question 18

In 3 dimensional optiocal motion capture, reflective markers are placed on the human body and the position of a marker in space is determined by the….

Answer 18

triangulation of the position of the marker relative to at least two cameras

Question 19

What does GPS stand for

Answer 19

Global positioning system

Question 20

What is GPS

Answer 20

A network of about 30 satellites orbiting the earth at an altitude of 20,000km

Question 21

How does GPS work

Answer 21

If you know how far away you are from satellite A then you know you must be in a certain area. If you do the same for satellite B and C you can work out your location by seeing where the 3 circles intersect

Question 22

What makes a GPS signal more accurate

Answer 22

The number of satellites that are above the horizon

Question 23

Standard GPS uses…

Answer 23

binary code signals from multiple satellites to determine position

Question 24

high precision GPS uses

Answer 24

Multiple frequencies to correct for atmospheric effects on radio waves. uses carrier wave cycles to compute precise vectors between multiple receivers

Question 25

Two vectors are colinear if they are….

Answer 25

parallel

Question 26

Define time

Answer 26

a non-spatial continuum in which events occur in apparently irreversible succession from the past through the present to the future

Question 27

How do infrared timing gates work

Answer 27

Use same technology as tv remotes. On one side of the small slot is an LED that emits a beam of infrared light. On the other side is a detector that see infrared light. The electronic detector instantly senses when anything block the light beam. this starts and stops the timer box

Question 28

what are 3 inertial measurement units?

Answer 28

Accelerometers
Gyroscopes
Magnetometers