Week 3 - Anthropometry

Question 1

Scalar

Answer 1

quantities that have a magnitude

• 28 degrees
• 25kgs
• 1.8m

Question 2

Vector

Answer 2

quantities that have a magnitude and a direction

• 25degrees North
• 26km/h West

Question 3

Distance

Answer 3

how much ground is covered, scalar

Question 4

Displacement

Answer 4

how far away you are from the start, vector

Question 5

Speed

Answer 5

time rate of change of distance

distance/time, scalar

Question 6

Velocity

Answer 6

Time rate of change of displacement

displacement/time, vector

Question 7

Position

Answer 7

location, vector

Question 8

What is the symbol for displacement?

Answer 8

X_

Question 9

What does - and + mean infront of velocity values?

Answer 9

Up/right or down/left

Question 10

What does delta stand for?

Answer 10

Change

Question 11

What is acceleration?

Answer 11

the time rate of change in velocity

m/s2

Question 12

What does - and + mean in front of acceleration values?

Answer 12

positive = accelerating
negative = slowing down

Question 13

When there is a 0 value for acceleration, what does that mean?

Answer 13

• no movement

- constant velocity

Question 14

What is one radian in degrees?

Answer 14

1 radian = 57.3 degrees

Question 15

What is the symbol for displacement?

Answer 15

θ

Question 16

In reference to displacement, is clockwise or anticlockwise positive?

Answer 16

Anticlockwise

Question 17

When using a cartesian co-ordinate system, what does the Y value need to be in regards to the X value?

Answer 17

Right angle

thumb rule for Z

Question 18

What is the laboratory/global co-ordinate system?

Answer 18

when the origin is the plate/ground, and all angles are in reference to the joint

Question 19

What is the segment/embedded co-ordinate system?

Answer 19

When the camera is attached to a segment and the original is a joint

Question 20

What is mass?

Answer 20

amount of matter in an object?

Question 21

What is weight?

Answer 21

weight force

Question 22

What unit is weight measured in?

Answer 22

Newtons (N)

Question 23

How do you measure weight?

Answer 23

mass x acceleration due to gravity

Question 24

What does ‘wg’ stand for?

Answer 24

weight due to gravity

Question 25

What does xCOM stand for?

Answer 25

centre of mass distribution

Question 26

what does x stand for in the COM equation?

Answer 26

position of each object

Question 27

What does the E stand for in the COM equation?

Answer 27

add all mass x position values up