Test 2- Part 2: Laws of Motion

Question 1

What are the two types of motion?

Answer 1

Linear motion

Angular motion

Question 2

Motion cannot occur w/ out what?

Answer 2

Force (muscular system)

Question 3

What is linear motion aka?

Answer 3

Translatory motion

Question 4

Distance that a system moves in a straight line

Answer 4

Linear displacement

Question 5

What are the two types of linear motion/.

Answer 5

Rectilinear motion

Curvilinear motion

Question 6

Motion along a straight line

Answer 6

Rectilinear motion

Question 7

Motion along a line

Answer 7

Linear motion

Question 8

Motion along a curved line

Answer 8

Curvilinear

Question 9

Rotation around an axis

Answer 9

Angular (rotary motion)

Question 10

Where in the body are the axis of rotation provided by?

Answer 10

Joints

Question 11

_________ motion of joints produces the _______ motion of walking

Answer 11

Angular

Linear

Question 12

Change in position or location of an object from its original point of reference

Answer 12

Displacement

Question 13

Actual sum length it is measured to have traveled

Answer 13

Distance (path of movement)

Question 14

Change in location of a rotating body

Answer 14

Angular displacement

Question 15

Distance that a system moves in a straight line

Answer 15

Linear displacement

Question 16

How fast an object is moving, or distance that an object moves in a specific amount of time

Answer 16

Speed

Question 17

Rate at which an object changes position. Includes the direction & describes the rate of displacement

Answer 17

Velocity

Question 18

Explain the law of inertia

Answer 18

A body in motion tends to remain in motion at the same speed in a straight line unless acted on by a force; a body at rest tends to remain at rest unless acted on by a force

Question 19

Resistance to action or change (acceleration/deceleration)

Answer 19

Inertia

Question 20

How do muscles produce force?

Answer 20

Stop motion
Start motion
Accelerate motion
Decelerate motion
Change direction of motion

Question 21

The greater an objects mass, the greater the __________

Answer 21

Inertia

Question 22

More mass=

Answer 22

More force needed to significantly change an object’s inertia

Question 23

Any activity carried out at a steady pace in a constant direction will ___________ energy

Answer 23

Conserve (endurance runners)

Question 24

Explain the law of acceleration

Answer 24

A change in the acceleration of a body occurs in the same direction as the force that caused it.
The change in acceleration is directly proportional to the
force causing it and inversely proportional to the mass of the body.

Question 25

The rate of change in velocity

Answer 25

Acceleration

Question 26

The amount of matter in the body

Answer 26

Mass

Question 27

Explain the law of reaction

Answer 27

For every action there is an opposite reaction

Question 28

Force on the surface reaction to the force we place on it

Answer 28

Ground reaction force

Question 29

We provide the _______ force while the surface provides the _______ force

Answer 29

Action | Reaction

Question 30

Force that results from the resistance between surfaces of two objects from moving upon one another

Answer 30

Friction

Question 31

On slick (wet) ground our shoe friction is ________ & we are more likely to slip

Answer 31

Reduced

Question 32

The amount of friction between two objects that have not yet begun to move

Answer 32

Static friction

Question 33

Friction occurring between two objects that are sliding upon one another

Answer 33

Kinetic friction

Question 34

_______ friction is always greater than ________ friction

Answer 34

Static | Kinetic

Question 35

How might you increase static friction?

Answer 35

Increasing the normal or perpendicular forces pressing the two objects together such as in adding more weight to one object sitting on the other object

Question 36

Ration of force needed to overcome the friction over the force holding the surfaces together

Answer 36

Coefficient of friction

Question 37

Resistance to an object rolling across a surface such as a ball rolling across a court or a tire rolling across a ground

Answer 37

Rolling friction

Question 38

The ability to control equilibrium (either static or dynamic)

Answer 38

Balance

Question 39

State of zero acceleration where there is no change in the speed or direction of the body, maybe either static or dynamic

Answer 39

Equilibrium

Question 40

Body is at rest or completely motionless

Answer 40

Static equilibrium

Question 41

All applied & inertial forces acting on the moving body are in balance, resulting in movement with unchanging speed or direction

Answer 41

Dynamic equilibrium

Question 42

To control equilibrium & achieve balance, ________ needs to be _________

Answer 42

Stability | Maximized

Question 43

Change in the body's acceleration; disturbance of the body's equilibrium

Answer 43

Stability

Question 44

Point at which all of the body's mass & weight are equally balanced or equally distributed in all directions

Answer 44

Center of gravity

Question 45

How is stability enhanced?

Answer 45

Finding body's center of gravity & appropriately changing it

Question 46

A person has balance when the _____ falls within _______

Answer 46

Center of gravity | Base of support

Question 47

A person has balance in the direct proportion to the _______

Answer 47

Size of the base

Question 48

The ________ a base of support, the ______ balance

Answer 48

Larger | More

Question 49

A person has balance depending on the _____

Answer 49

weight (mass)

Question 50

The more _______, the _____ balance

Answer 50

Greater | More

Question 51

A person has balance, depending on the _______ of the center of gravity

Answer 51

Height

Question 52

The ________ the center of gravity, the ______ balance

Answer 52

Lower | More

Question 53

A person has balance, depending on where the __________ is in relation to the ____________

Answer 53

Center of gravity | Base of support

Question 54

Balance is less if the center of gravity is near the _______ of the base

Answer 54

Edge

Question 55

In anticipation of an oncoming force, stability may be _________ by enlarging the size of the base of support in the direction of the anticipated force

Answer 55

Increased

Question 56

__________ may be enhanced by _________ the friction between the body & the surfaces it contacts

Answer 56

Equilibrium | Increasing

Question 57

________ about an axis aids balance

Answer 57

Rotation (moving bike is easier to balance than a stationary bike)

Question 58

_________ _______ functions contribute to balance

Answer 58

Kinesthetic physiological (sight, touch, sense)