Midterm Flashcards
(93 cards)
1
Q
t stands for
A
time
2
Q
a stands for
A
acceleration
3
Q
x stands for
A
horizontal displacement
4
Q
y stands for
A
vertical displacement
5
Q
Vo stands for
A
initial velocity
6
Q
Vf or V stands for
A
Final Velocity
7
Q
g stands for
A
gravity which is 9.81 meters/second squared
8
Q
Ag stands for
A
acceleration due to gravity
9
Q
Voy
A
initial vertical velocity
10
Q
Vox
A
initial horizontal velocity
11
Q
F stands for
A
Force
12
Q
Ff stands for
A
Force of Friction
13
Q
FN stands for
A
Force Normal
14
Q
Fg stands for
A
Force due to gravity
15
Q
Fnet stands for
A
The net forces
16
Q
mu “ weird u looking thing” stands for
A
coefficient of friction
17
Q
Fapp stands for
A
Force applied
18
Q
Fax stands for
A
Force due to acceleration in the horizontal direction
19
Q
Fay stands for
A
Force due to acceleration in the vertical direction
20
Q
Ac stands for
A
centriphical acceleration
21
Q
Fc stands for
A
centriphical force
22
Q
m stands for
A
mass
23
Q
r stands for
A
radius
24
Q
T stands for
A
tension
25
W stands for
Work
26
P stands for
Power
27
K stands for
Kenertic energy
28
h stands for
height
29
u stands for
potential gravitational energy
30
w( omega) stands for
angular velocity
31
a ( alpha) stands for
angular acceleration
32
vectors
has magnitude and direction
33
scalars
has magnitude but no direction
34
elastic collisions
two objects collide and break apart into at least two separate objects
35
inelastic collisions
two objects collide and become one object or can be treated as one object
36
cantilever
a beam anchored at only one end. The beam carries the load to the support where it is forced against by moment and shear stress.[1] Cantilever construction allows for overhanging structures without external bracing.
37
instantaneous velocity
the velocity or speed at any given instant of time. this is always changing because speed is always changing
38
average velocity
the average of all the instantaneous velocities recorded
39
uniform acceleration
constant velocity
40
apparent weight
is a property of objects that corresponds to how heavy an object is. The apparent weight of an object will differ from the weight of an object whenever the force of gravity acting on the object is not balanced by an equal but opposite normal force. By definition, the weight of an object is equal to the magnitude of the force of gravity acting on it.
41
impulse
is defined as the product of the average force multiplied by the time it is exerted.[2] Impulse is a vector quantity since force is a vector quantity.
42
momentum
mass in motion. any object ( because all objects have mass) that has a velocity has a momentum
43
Henry Cavendish
discovered the universal gravitational constant ... don't need to worry about knowing this its on the formula sheet
44
Galileo
he discovered kinematics
45
kinetic energy
energy in motion
46
potential energy
all the energy an object has. the more mass an object has the more potential energy it has
47
displacement
the total amount an object moves, it can be forward backward left and right but all these are added up and used to find a length of displacement
48
length
the amount an object moves in one direction
49
moment of inertia
is the mass property of a rigid body that defines the torque needed for a desired change in angular velocity about an axis of rotation. Moment of inertia depends on the shape of the body and may be different around different axes of rotation.
50
torque
is the tendency of a force to rotate an object about an axis,[1] fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist to an object
51
centriphical acceleration
is defined as the rate of change of angular velocity with respect to time
52
centriphical forcce
Centripetal force is the force acting on the body which makes the body move towards the center of axis of rotation. This force acts along the radius towards the center of the circle.
53
N stands for
Newtons
54
Triangle ( delta) stands for
change in
55
I stands for
moment of inertia
56
Vfx stands for
final horizontal velocity
57
Vfy stands for
final vertical velocity
58
T stands for
Torque
59
Vc stands for
centriphical velocity
60
theta stands for
angular measurement
61
J stands for
Joule
62
W stands for
Watt
63
P stands for
momentum
64
J stands for
impulse
65
Ko stands for
initial kenetic energy
66
Kf stands for
final kenetic energy
67
Pe stands for
potential energy
68
units for time
seconds
69
units for acceleration
meters/ seconds squared
70
units for velocity
meters/ second
71
units for force
Newtons
72
units for work
Joule
73
units for mass
Kilograms
74
units for power
Joules / second or watts
75
units for energy
Joules or calories
76
units for impulse
newtons/ second
77
units for momentum
mass times velocity
78
units for omega
meters/ second
79
units for alpha
meters/ second squared
80
units for circular displacement
radians, revolutions, and degrees
81
units for Torque
newtons x meters
82
units for moment of inertia
Kilograms
83
units for displacement
meters
84
what does the slope in a displacement v, time graph represent?
the velocity
85
what does the area under the graph in a force v. displacement graph represent?
the impulse
86
Newton's first law
the law of inertia. says any object will stay in motion in a straight line at a constant speed. an object will stay at rest as long as not acted by some external force.
conditions for this to be true:
1. the object MUST move at a constant speed
2. the object MUST start at rest
87
Newton's second law
an object will only accelerate if there is a net or unbalanced force acting upon it. The presence of an unbalanced force will accelerate an object - changing its speed, its direction, or both its speed and direction
88
newton's third law
every action has an equal and opposite reaction.
| example: you push on the chair and the chair pushed back.
89
angular momentum
is the amount of rotation an object has, taking into account its mass and shape. It is a vector quantity that represents the product of a body's rotational inertia and rotational velocity about a particular axis
90
angular velocity
is defined as the rate of change of angular displacement and is a vector quantity which specifies the angular speed (rotational speed) of an object and the axis about which the object is rotating.
91
center of gravity
the place of the object where the mass is concentrated and gravity is pulled down. in neat orderly even objects the center of gravity is in the middle in un-orderly objects like human bodies the center of gravity is just above the belly button. the center of gravity is what helps keep objects balanced
92
center of mass
is the unique point where the weighted relative position of the distributed mass sums to zero. The distribution of mass is balanced around the center of mass and the average of the weighted position coordinates of the distributed mass defines its coordinates
93
gravitational potential energy
is acquired by an object when it has been moved against a gravitational field. In order for an object to be lifted vertically upwards, work must be done against the downward pull of gravity. This work is then stored as gravitational potential energy.
