Final Examination
PHY 240
Instructions:
Express your answers in full, grammatically correct sentences using unambiguous,
technical language. Avoid pronouns.
Do not place unexplained symbols or acronyms in the text.
The acceptable answers must be complete
32. Newton's second law
2
F41
1
4
F43
3
F42
a
Fnet
In an inertial reference
frame, the acceleration of a
particle is proportional to the
net force (the sum of all
forces) exerted on the
particle
and
inversely
proportional to the mass of
the particle:
Fnet
TORQUE AND ANGULAR MOMENTUM
73. Angular momentum of a particle.
The angular momentum of a particle,
about the reference point O, is defined
as the vector product of the position,
relative to the reference point, and
momentum of the particle
l rp
O
74. T
90. Stress
In a medium (system of particles), a set of parameters
leading to the forces exerted on an infinitesimal cube
element within the medium, is called the stress tensor.
z
zz
yz
xz zy
zx
yx
yy
xy
xx
y
x
Stress tensor represents a physical quantity
States of matter
Solid:
Crystalline
Amorphous
Fluid:
Liquid
Gas
Plasma
internal interactions
z
zz
yz
xz
zx
yx
xx
x
zy
xy
yy
y
In a medium, a set of parameters
leading to the forces exerted on an
infinitesimal cube element within the
medium, is called
110. Review of some thermal processes.
a)
adiabatic process - no heat is transferred
dU = - dW
b)
isochoric process - constant volume process
dU = dQ
c)
cyclical process - the system returns to the initial state
Q = W
d)
isothermal process - constant temp
b)
Theorem
The sum of the vector projections of a vector in all mutually
perpendicular (in the sense of the scalar product) directions is
equal to the vector.
n
A A e i e i
i 1
The projections constitute the vector components of the vector.
proof.
n
A
Test 2
PHY 240
1. a)
b)
c)
d)
Classify appropriately the items listed in the included table.
What is an inertial reference frame?
Explain Newtons second law of motion for a particle.
Explain the inverse relation between velocity and acceleration.
2. A 25