Physics Flashcards
Angstrom (Å)
1Å=10^-10
Nanometer (nm)
1 nm = 10^-9m
Electron volt (eV)
Represents the energy acquired by an electron accelerating thru a potential difference of 1 volt
1 eV = 1.6 x 10^-19 J
m =
10^-3
k =
10^3
M =
10^6
n =
10^-9
Giga (G or B)
10^9
mega (M)
10^6
Kilo (k)
10^3
Centi (c)
10^-2
Milli (m)
10^-3
Micro
10^-6
Nano
10^-9
Pico (p)
10^-12
Sin
y/h = opposite side/hypotenuse
Cos
x/h = adjacent side/hypotenuse
Tan
y/x = opposite side/hypotenuse
Scalars
Numerical quantities that have magnitude but no direction such as distance, speed, and mass
Vector
Quantities have both magnitude and direction like displacement, velocity, and force
Resultant of vectors
The sum of 2+ vectors
Displacement (delta x)
Vector quantity that describes the change in position of the object
Has both direction & magnitude and
Average velocity
The ratio of the displacement vector over the change in time
v=(delta x)/(delta t)
v has the same direction of delta x
Instantaneous velocity
Aka velocity
Refers to a single instant of time
Average velocity as delta t approaches 0
The graph of this is defined as the slope of the graph of the object’s position with respect to time at the particular time, t
Average speed
s=d/(delta t)
d is the distance traveled (scalar)
Not always the same as the magnitude of the average velocity
Instantaneous speed
Magnitude of the instantaneous velocity vector
A scalar
acceleration
rate of change of an object’s velocity
a vector
average acceleration
change in instantaneous velocity over the time period delta t
a=(delta v)/(delta t)
instantaneous acceleration
the acceleration at one point of a particle’s path
average acceleration as delta t approaches 0
slope of the line giving the object’s velocity w/ respect to time at a particular time, t
motion w/ constant acceleration
the acceleration of a body is proportional to the net force applied to the body
when body is under the influence of a constant force, the acceleration is also constant
linear motion
acceleration and velocity vectors are along the line of motion
projectile motion
object has velocity and position components in both the vertical and horizontal directions
