Linear Kinetics Terms

Question 1

Centripetal force

Answer 1

Force that moves the system towards the center of the path of motion

Question 2

Coefficient of friction

Answer 2

Number that serves as an index of interaction between two surfaces in contact

Question 3

Coefficient of restitution

Answer 3

Number that serves as an index for elasticity

Question 4

Conservation of momentum

Answer 4

In absence of external force, the total momentum of a given system remains constant

Question 5

Deformation

Answer 5

Change in shape

Question 6

Elastic force

Answer 6

Acts to return a spring back to original state

Question 7

Force

Answer 7

Push/pull producing a change in motion

Question 8

Force plate

Answer 8

Using transducers to measure forces involved during motion

Question 9

Friction

Answer 9

Force acting at the area of contact between two surfaces in the direction opposite that of motion/motion tendency

Question 10

Gait

Answer 10

Pattern of movement of organism

Question 11

Impact

Answer 11

Collision characterized by exchange of large force during small time interval

Question 12

Impulse

Answer 12

Change in momentum, applying force over period of time

Question 13

Inertia

Answer 13

Body remains in state of rest/constant velocity unless acted upon by an external force

Question 14

Kinetic friction

Answer 14

Constant magnitude friction generated between two surfaces in contact during motion

Question 15

Loading

Answer 15

Placing a bürden/force on an object

Question 16

Mass

Answer 16

Quantity of matter contained in an object

Question 17

Maximum static friction

Answer 17

Max. amount of friction that can be generated between two static surfaces

Question 18

Momentum

Answer 18

Quantity of motion measured as the product of body’s mass/velocity

Question 19

Normal force

Answer 19

Force acting perpendicular to two surfaces in contact

Question 20

Perfectly elastic force

Answer 20

Impact during which the velocity of system is conserved

Question 21

Perfectly plastic force

Answer 21

Impact resulting in total loss of system velocity

Question 22

Reaction force

Answer 22

For every action, there is an equal/opposite reaction force

Question 23

Strain gauge

Answer 23

Wire attached to two pads, resistance of wire changes as wire bends

Question 24

Stress

Answer 24

Distribution of force within a body; quantified as force divided by area over which the force acts

Question 25

Transducers

Answer 25

Converts forces into electrical signals

Question 26

Weight

Answer 26

Attractive force that earth exerts on a body

Question 27

Conservation of Mechanical Energy

Answer 27

Energy cannot be created or destroyed, only transferred/transformed

Question 28

Energy

Answer 28

Ability to do work

Question 29

Ergometry

Answer 29

Measuring work and power in the lab

Question 30

External work

Answer 30

Work done on another system

Question 31

Internal work

Answer 31

Work done within a system

Question 32

Isometric

Answer 32

Force occurring without work being done

Question 33

Kinetic energy

Answer 33

Energy which a body possesses by virtue of being in motion; ability to do work by virtue of being in motion

Question 34

Mechanical

Answer 34

Sum of kinetic/potential energy, no movement = no work

Question 35

Negative work

Answer 35

Movement occurs in opposite direction as force

Question 36

Positive work

Answer 36

Movement occurs in same direction as force

Question 37

Potential energy

Answer 37

Energy by virtue of a body's position

Question 38

Power

Answer 38

Rate of work production, work divided by time at which work was done

Question 39

Spring constant

Answer 39

Factor of stiffness in spring force

Question 40

Stiffness

Answer 40

Property of an object's ability to resist deformation

Question 41

Strain energy

Answer 41

Capacity to do work by virtue of a deformed body's return to its original shape

Question 42

Work

Answer 42

Amount of energy transferred by a force acting through a distance

Question 43

Work-Energy Theorem

Answer 43

Work done on a object by a net force equals the change in kinetic energy of the object