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Gravity
Terms in this set (50)
Time
t
Second (sec)
Scalar
Distance
d
meters (m)
Scalar
Displacement
d
Vector:
measure of the distance between two points; shortest line between two points
Speed
v
(m/s)
Scalar
Velocity
v
(m/s)
Vector:
distance divided by time
Acceleration
a
(m/s^2)
Vector:
the rate at which an object changes its velocity
Mass
m
Kilograms (kg)
Scalar
Acceleration due to gravity (on earth's surface)
g
(m/s^2)
Vector:
constant value, does not depend on time, initial speed, mass of object
g= 9.81 m/s^2
Net force
Fnet
Newtons (N)
Vector:
the sum of all forces acting on an object
Coefficient of Friction
μ
mu (μ)
Scalar
Weight/ Force of Gravity
Fg
Newtons (N)
Vector:
the force of gravity experienced by an object (mass x acceleration due to gravity)
Frictional force
Ff
Newtons (N)
Vector:
Direction is always opposite the direction of the object's motion (velocity)
Centripetal Force
Fc
Newtons (N)
Vector:
directed towards the center of the circle (mass x centripetal acceleration)
Centripetal acceleration
ac
(m/s^2)
Vector:
directed towards the center of the circle (velocity^2 divided by radius)
Radius
r
meters (m)
Scalar
Universal gravitational constant
G
(N•m^2/kg^2)
Scalar
G= 6.67•10^-11 N•m^2/kg^2
Distance between the centers of two masses or charges
T
meters (m)
scalar
Momentum
p
momentum (kg•m/s)
Vector:
mass • velocity
Impulse
J
J (N•s)
Vector:
the force and time required to produce a change in momentum)
Work
W
Joules (J = N•m)
Scalar
Total energy
Et
joules (J)
scalar
Kinetic Energy
KE
joules (J)
scalar
Gravitational potential energy
PEg
joules (J)
Scalar
Potential energy of a spring
PEs
joules (J)
scalar
Compression or stretch distance of a spring
d
meters (m)
scalar
Spring constant
k
(N/m)
scalar
Power
p
watts (J/s)
Scalar
Wavelength
λ
lambda (λ)
Scalar
Frequency
f
Hertz (Hz=1/s=s^-1)
Scalar
Speed of light in a vacuum
c
(m/s)
Scalar
c = 3.00 • 10^8 m/s
Speed of sound (at STP)
(m/s)
Scalar
3.31 • 10^2 m/s
Period
T
Seconds (s)
Scalar
Angle of incidence
θi
Degrees (。)
Scalar
Angle of refraction
θr
Degrees (。)
Scalar
Index of refraction
n
scalar
Charge
q
Coulombs (c)
Scalar
Elementary charge
e
Coulombs (c)
Scalar
1.6 • 10^-19 C
Electrostatic constant
k
(N • m^2/c^2)
k = 8.99 • 10^9 N • m^2/c^2
Electrostatic/ electric force
Fe
Newtons (N)
Vector:
If the electric force is positive or negative
Electric field
E
newtons/ coulombs (N/c)
Vectors:
The direction of the force it would exert on a positive test charge
Potential difference/ voltage
∆V
Volts (v)= joules/coulombs (J/c)
Scalar
Current
I
Ampere (A)
Scalar
Resistance
R
Ohms (Ω)
Scalar
Resistivity
ρ
(Ω m)
Scalar
Length of conductor
L
Meter (m)
Scalar
Cross-sectional area/ thickness of a conductor
A
(M^2)
Scalar
Equivalent resistance
Req
Ohms (Ω)
Scalar
Magnetic field
...
Energy of a photon
...
Planck's constant
...
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