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Biomechanics exam 2
Exam 2
42
Anatomy
Undergraduate 4
03/23/2016

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Term
Kinematic quantities
Definition
Linear position
Linear distance and displacement
Linear speed and velocity
Linear acceleration
Term
Vector components of linear position
Definition
Linear displacement, linear velocity, linear vector acceleration
Term
Scalar components of when your position
Definition
Linear distance, linear speed, linear scalar acceleration
Term
formula and definition of linear speed
Definition
Linear distance/elapsed time

how fast the object moves
Term
definition of linear distance:
Definition
length of the path
Term
formula and definition of linear scalar acceleartion:
Definition
change in speed/elapsed time

how fast we change linear speed
Term
definition of linear displacement:
Definition
change in linear position, net effect of motion, vector quantity because it has both magnitude and direction, unit is meters
Term
formula and definition of linear velocity:
Definition
linear displacement/elapsed time

how fast the object moves in which direction, vector quantity

*0 velocity=no net motion
Term
formula and definition of linear venctor acceleration
Definition
change in velocity/elapsed time

how fast we change linear velocity
Term
definition of linear position:
Definition
linear location of object of interest at a given instant, considered vector, unit is m (meter)
Term
tip-to-tale method:
Definition
connect all vectors tip-to-tale, draw an arrow that connects the tale of first vector to the tip of the last vector
Term
causes of acceleration:
Definition
1. change in magnitude of velocity
2. change in direction of velocity
Term
units of measurement for angular kinematics:
Definition
1. degree
2. radian
Term
quantities of angular kinematics:
Definition
1. angular position & displacement
2. angular velocity
3. angular-acceleration
Term
definition of radian:
Definition
the angle with which the length of the arc becomes the same to the radius, approximately 57.3 degrees
Term
1 revolution=2π=__________degrees
Definition
360
Term
1π=_____________degrees
Definition
180
Term
π/2=________degrees
Definition
90
Term
π/3=________degrees
Definition
60
Term
π/4=________degrees
Definition
45
Term
π/6=________degrees
Definition
30
Term
definition of angular position:
Definition
angular location at given instant
Term
angular position is measured in units of __________
Definition
radians
Term
clockwise direction means:
Definition
negative direction
Term
counterclockwise direction means:
Definition
negative direction
Term
definition of angular displacement:
Definition
change in angular position, net effect of angular motion, vector quantitiy
Term
angular displacement is measured in units of _______
Definition
radians
Term
zero angular displacement means:
Definition
no net direction
Term
definition and formula of angular velocity:
Definition
rate of change in angular position

angular displacement/time
Term
angular velocity is measured in units of:
Definition
radians/second (rad/s)
Term
zero angular velocity means:
Definition
zero angular displacement, which means no net rotation
Term
definition and formula of angular acceleration:
Definition
rate of change in angular velocity

change in velocity/change in time
Term
angular acceleration is measured in
Definition
rad/sec²
Term
Zero Angular Acceleration means
Definition
Constant angular velocity
Term
Formula for magnitude of curvilinear displacement
Definition
Radius (r)* change in angular displacement
Term
Formula for magnitude of linear velocity
Definition
V=Radius(r)*angular velocity(w)
Term
Tangential:
Definition
Direction of the linear velocity
Term
Tangential Acceleration is caused by:
Definition
Change in the magnitude of velocity (V)
Term
Formula for tangential acceleration is:
Definition
a=change in velocity/change in time
Term
Radial acceleration is caused by:
Definition
Change in the direction of velocity
Term
Formula for radial acceleration is:
Definition
Velocity Squared/Radius
Term
Centripetal acceleration happens towards:
Definition
The center of rotation
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