Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Mechanical Analysis of Movement EP 4503 > Test 3 > Flashcards

Test 3 Flashcards

1
Q

a body will remain at rest or continue to move with a constant speed in a straight line unless acted upon by an outside force

A

Newtons 1st law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Law of acceleration

F=ma

A

Newtons 2nd law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

a force that is causing a body to speed up

force is in the same direction

A

propulsive force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

a force that is causing a body to slow down

force is in the opposite direction

A

braking force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

a force does not cause an acceleration, a _______ does.

A

net effective force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

for every force, there is an equal and opposite reaction force

A

Newtons 3rd law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

_____ opposes motion b/w two objects in contact and will always be ______ to the contact area

A

Friction

parallel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is the revised newtons 2nd law

A

F= mv/t

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

formula for impuse

A

force x time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

______ is equal to change in momentum

A

Impulse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what 3 things can you do to change your ability to rotate an wheel?

A
  • increase length of lever arm
  • apply force perpendicular to rigid body
  • apply larger force by using foot or leg
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

the turing effect of a force

A

Torque (T) or moment of force (M)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

formula for torque

A

T= moment arm x force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

distance from the axis of rotation to the point of force application

A

lever arm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

perpendicular distance from the force vector to the axis of rotation

A

moment arm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

formula for the angular equivalent of newtons 2nd law

A

T= moment of inertia x angular acceleration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

a torque that is increasing the speed of rotation

A

propulsive torque

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

a torque that is decreasing the speed of rotation

A

braking torque

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

a rigid body that is used in conjunction with a pivot point to multiply the force or speed applied to another body

A

lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what are the functions of a simple machine (lever)

A
  1. balance 2 or more forces
  2. change direction of the applied force
  3. favor speed and ROM
  4. favor force production
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

FAR or RAF

A

1st class lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

ARF OR FRA

A

2nd class lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

AFR or RFA

A

3rd class lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

lever that can do all four functions

A

1st class lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

favors speed and ROM

A

3rd class lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

favors force production

A

2nd class lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Resistance lever arm is always longer

A

3rd class lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

force moment arm is always longer

A

2nd class

29
Q

examples of 1st class levers in body

A

neck extension

elbow extension

30
Q

examples of 2nd class levers in body

A

push up

toe raises

31
Q

examples of 3rd class levers

A

elbow flexion
knee extend and flex
shoulder extend and flex
hip extend and flex

32
Q

most common type of lever in the body

A

3rd class

33
Q

two forces that are equal in magnitude, opposite in direction, and in the same plane
produce pure rotation with no translation

A

force couple

34
Q

angular impulse formula

A

impulse = torque x time

35
Q

angular impulse is equal to ______

A

angular momentum (H)

36
Q

To improve performance, we would want to ____________

A

maximize angular velocity

37
Q

to minimize injury risk, we would want to __________

A

decrease average torque

38
Q

a resistance that increases with the amount of force or torque applied

A

accommodating resistance

39
Q

Isokinetic dynamometers maintains constant _______ no matter the torque

A

angular velocity

40
Q

a special case where both the linear and angular accelerations are zero, and thus the sum of the external forces and sum of the external torques are zero

A

static equilibrium

41
Q

regardless of stance, the ______ cannot be located outside the _______ to maintain balance

A

COP

BOS

42
Q

the state of matter that makes things change, or has the potential to make things change

A

energy

43
Q

the energy that a body has due to its motion

A

kinetic energy

44
Q

the energy a body has that has the potential to change something but is not currently changing anything

A

potential energy

45
Q

formula for kinetic energy

A

KE= 1/2 mv squared

46
Q

the potential energy that a body has due to its position

A

gravitational potential energy

47
Q

the energy a body has due to its deformatin

A

strain potential energy

48
Q

the process of changing the amount of energy in a system

A

work

49
Q

formula for work

A

w= F x d

50
Q

_____ work means that the energy is entering the system

A

postive

51
Q

______ work means that the energy is leaving the system

A

negative

52
Q

to jump high you need to _____ your legs as much as possible at take off to increase ______ and increase _____

A

extend
change in position
potential energy

53
Q

at the top of a jump (apex), ________ = 0

A

kinetic energy

54
Q

as you go down, ______ energy is changed to ______ energy

A

potential energy is changed to kinetic energy

55
Q

the amount of mechanical energy that can be expended with a given amount of energy

A

efficiency

56
Q

the amount of energy required to perform a certain amount of work (MEE)

A

economy

57
Q

lower energy requirement for the same amount of work =

A

more economical movement

58
Q
  • the time rate of doing work
  • how energy is leaving the system
  • how much force can be produced while moving quickly
A

power

59
Q

formula for power

A

power= work/ time (W)

60
Q

a collision where two objects bounce off each other without deformation or loss of heat

A

elastic collision

61
Q

examples of elastic collisions

A

colliding pennies, billiard balls

62
Q

a collision in which two objects stick together after they collide

A

inelastic collision

63
Q

example of inelastic collisions

A

football players colliding

64
Q

kinetic energy is conserved in a _______ collision

A

elastic

65
Q

Kinetic energy is not conserved in a ________ collision

A

inelastic

66
Q

the measure of elasticity of a collision between two objects

A

the coefficient of restitution (e)

67
Q

perfectly elastic collision

A

e= 1

68
Q

perfectly inelastic collision

A

e= 0

69
Q

the portion of a body’s mass that is involved with a collision

A

effective mass

Mechanical Analysis of Movement EP 4503 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions