angular kinematics

Question 1

absolute angle

Answer 1

angle between body segment and absolute (real world) axis - trig

Question 2

relative angle

Answer 2

joint angle

contained angle

Question 3

cosine law for angles

Answer 3

inverse cos of ((a^2+b^2-C^2 )/(2ab))

Question 4

joint angle convention

Answer 4

inside closing space where they can only get smaller

Question 5

angular displacement

Answer 5

magnitide and direction of a body’s change in angular position

Question 6

3 measurements of theta

Answer 6

degrees
revs
radians

Question 7

angular velocity

Answer 7

rate of change in angular position

Question 8

tangential velocity

Answer 8

perpendicular velocity of any point on the rotating segment

Vt=wr

Question 9

skilled movements

Answer 9

require coordinated angular kinematics

Question 10

angular acceleration

Answer 10

rate of change in angular velocity

Question 11

tangential acceleration

Answer 11

perpendicular acceleration of any point on the rotating segment
at=ar

Question 12

centripetal acceleration

Answer 12

longitudinal acceleration of any point of the rotating segment
ar=w^2*r

Question 13

at constant angular v

Answer 13

at=0 but ar is bigger of smaller than 0

Question 14

crunch factor

Answer 14

lateral flex angle x rotational velocity