Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Praxis Physical science > Physics > Flashcards

Physics Flashcards

1
Q

what does kinematics deal with?

A

the positions and motions of objects and their relation to time

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

what units does kinematics deal with?

A

displacement, velocity, acceleration, time

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

what do vectors deal with?

A

displacement, velocity, acceleration

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

what is a vector?

A

physical quantity with direction as well as magnitude

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

what is a scalar?

A

a unit that has no direction

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

what is an example of a scalar?

A

temperature or time

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

what is displacement?

A

change in the position of an object, with direction

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

what is the formula for velocity?

A

total displacement/time elapsed

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

what is acceleration?

A

the rate of change of velocity

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

what is the formula for acceleration?

A

final velocity-initial velocity/ time elapsed

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

what is the unit for acceleration?

A

ms2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is instantaneous velocity?

A

limit of average velocity as time is made smaller

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

what is the formula for velocity as a function as time?

A

v=vo+at

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

what is the formula for displacement varying with time and velocity?

A

d=1/2 (vo+vf)t

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

what is the formula for displacement as a function of time?

A

d=vot+ 1/2 at

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

what is the formula for velocity as a function of displacement?

A

v2f=v02+2ad

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

what is the sum of vectors called?

A

a resultant

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

what can acceleration be caused by?

A

change in the direction, as well as the change in speed of velocity

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

what are the four cases of acceleration on a plane?

A

zero acceleration
acceleration due to changing direction but not speed
acceleration due to changing in speed but not direction
acceleration due to changing both speed and direction

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

what are the assumptions made with projectile motion?

A
  1. acceleration due to gravity is constant and directed downward
  2. the effect of air resistance is negligible
  3. the surface of the earth is a stationary plane (curvature of earth is negligible)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what is the time of falling in terms of projectile motion related to?

A

the time it takes from the highest point,

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

describe projectile path?

A

parabolic and symmetric

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

what is the formula for uniform projectile motion?

A

v=2πR/T

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

what is centripetal acceleration?

A

acceleration vector directed to the center

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
what is newtons first low of motion?
Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
26
what is newton's seconds law of motion?
The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma.
27
what is newton's third law of motion?
for every action there is an equal and opposite reaction
28
what is mass?
measure of the amount of matter in an object | it lends to the reluctance of an object to change
29
what is weight?
weight is the mass along with the force of gravitation
30
what is the formula for weight?
W=mg
31
what is static equilibrium?
an object that is not moving
32
what is important to friction at low velocities?
the direction of the force of friction is opposite to the direction of motion friction is proportional to perpendicular force friction is independent magnitude depends on material
33
what is static friction?
force of friction when there is no movement
34
what is kinetic friction?
when there is relative motion
35
what is newtons law of universal gravitation?
every mass is attracted to another mass
36
what are keepers laws of planetary motion?
the law of orbits: planets move in elliptical orbits law of areas: a line joining a planet and the sun sweep out equal area law of periods: the square of any plane is proportional to the cube of the axis
37
what is an impulse?
the product of the average force acting on a body at the time of contact
38
what is conservation of momentum?
if there is no external force acting on a system the system remains in equilibrium
39
what is energy?
the ability to do work
40
what is work?
work is applied when a force moves through a distance
41
what is the formula for work?
W= force and distance moved
42
what is the unit for work?
Joule, which is kg.ms2
43
what is potential energy?
is stored energy, the ability of a system to do work base don it's position or internal structure. example a spring
44
what is gravitational potential energy?
energy base don position,
45
what is the formula for potential energy?
f=mgh
46
what is elastic potential?
the potential found in a spring
47
what is the formula for elastic potential?
F=-kx | x is the distance of stretch, and k is the spring constant
48
how does spring content relate to coils?
the less stretchy the larger the spring constant
49
what is power?
the rate of doing work
50
what is the formula for power?
P=W/t
51
what does the conservation of energy encompass?
potential energy at different points
52
what is a rigid body?
an object with mass, that holds it's shape
53
what is elastic modulus?
relationship of stress and strain
54
what is Hooke's law?
directional relationship between stress and a spring
55
what is the formula for Hooke's law?
F=-kx (k is constant)
56
what is the restoring force?
force that allows spring to come back to position
57
what is a period?
the time for one complete vibration
58
what is a frequency?
the number of complete vibration per second, and is the cycle, it is measured in Hertz
59
what is the amplitude ?
distance from the maximum vertical displacement, to the central point of motion, the greatest distance up or down.
60
what is the formula for simple harmonic motion?
T=2π√m/k
61
how do you calculate for pendulum?
T=2π√l/g | l is length, g is acceleration due to gravity
62
what is density?
p=m/v
63
what is pressure?
F/A
64
what is pascal's principle?
pressure applied to one point in a fluid, is transmitted equally to all parts of a fluid
65
what is archimedes principle?
the magnitude of buoyant force, is equal to the weight of fluid displaced
66
what is buoyant?
upward force an object placed in fluid experiences
67
what is wavelength?
the overall shape of a wave
68
what is amplitude?
the maximum displacement of particles
69
what is the period (T)?
The time for one wave to pass at a given point
70
what is the frequency?
number of waves passing a given point in specific time
71
what is the formula for frequency?
f=1/t
72
what is the velocity of a wave?
v=lambda/T
73
what is the superposition principle?
if two waves pass through a point, the combined waves are the superimposed wave
74
what is constructive principle?
when two waves on opposite end interact and from a larger wave
75
what is destructive interference?
when two waves on the opposite ends and inverted collide and neutralize
76
what is pitch?
depends on the frequency of tone
77
what is intensity?
the amount of energy crossing an area in time
78
what is resonance?
when two vibration rates are the same
79
what is thermal contact?
if two objects can manipulate each others temperature
80
what is thermal expansion?
the phenomenon that most object expand when heated
81
what is boyle's law?
if gas is compressed the pressure become related to the volume
82
what is avogardor's number?
6.02 X 10^23
83
what is the formula for heat?
Q=mc∆t
84
what is the second law of thermodynamics?
no machine is every 100% efficient
85
what is entropy?
how much heat is unavailable for work
86
what is the formula for entropy ∆s?
∆S=∆Q/T
87
what is a conductor?
a material through which electricity can naturally flow
88
what is an insulator?
material through which electric charges do not move easily
89
what is an electroscope?
device used to indicate charge
90
what is coulombs law?
gives the magnitude of electrostatic force between two charges
91
what is electric flux?
number of field lines that pass through a surface
92
what is a capacitor?
electrical device for storing charge
93
what is ohms law?
V=I/R | looks at resistance, depend on length of conductor, cross section, and resistance
94
what is Ampere's law?
looks at the calculation of currents and the direction they move in
95
what is Faraday's law?
emf induced in a wire is proportional to the rate of the flux through the loop
96
what is the difference between a motor and a generator?
a generator takes mechanical energy and turns it into electrical and motor, takes electrical and turns it into mechanical
97
what is polarized light?
light is confined to a particular plane
98
what is the original ray of light called?
the incidence ray
99
what is the light ray after reflection called?
the reflected ray
100
what is the normal?
line perpendicular to the surface
101
what is the law of reflection?
the angle of incidence is equal the law of reflection
102
what is refraction?
the bending of light
103
what does the compound microscope do?
allows an object to be magnified
104
what is the angle of deviation?
a given ray that is bent from the original

Praxis Physical science (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions