1. If the final kinetic energy is greater than the initial kinetic energy in a collision, some of
the internal energy at the time of the collision must have been changed into kinetic
energy. This is called exoergic energy (energy releasing). If KE initial
The reading starts off with the question, Do all motions require a cause?. The field of
quantum physics relates to the behavior of microscopic particles like electrons or atoms.
Classical mechanics focuses on motion of an object which interacts with surro
PHYS 121C - Fake Quiz 2
Angular Momentum, Work and Energy
Name:
1. A horizontal axle consists of a thin rod of mass mrod and length L, as shown below. A large
"pulley" of mass M' and radius R is at the center and two cylinders of mass M and radius R/2 are
PHYS 121 Final Exam Extra Equations (to be printed on back of regular equation sheet)
=
Projectile Motion
=
If we have constant acceleration:
2 cos sin
x-direction
Circular Motion
= +
1
= +
2
= + 2
= +
=
=
F
= F
F
Momentum
Work and Energy
W
The passage of Kinematics with Vectors (2.1) starts off by giving the reader a scenario. What
the reader is supposed to draw from this scenario, is that when using vectors your goal is not to
find the sum as an answer, rather the position of a location. F
The standard of mass is measured by kilograms a SI unit. However, research for a replacement
for the kilogram is underway because atomic masses cannot be measured as accurately with
the standard kilogram. A related unit is known as the mole, it serves to
To find center of mass, coordinate system must be employed, and the masses must be
multiplied by their position then divided by the mass of the entire system, derive if trying
to find velocity or acceleration of cm. If net external force on particle is ze
When Body A exerts force on Body B, Body B will exert the same amount force back on Body A.
The force applied by Body B will be equal in magnitude and always in the opposite direction of
the force of Body A. As mentioned in class, Newtons third law isnt e
In projectile motion (absence of air resistance) acceleration is same in magnitude and
direction. Uniform Circular Motion is when something is constant in magnitude of
acceleration or velocity but constantly changes direction ex: Earth, Rotors, etc. Force
Knowing acceleration we can find velocity at all times (Vx=V0x+AxT); and position
(x=x0+v0xt+1/2axt^2). Assuming particle moves in 3 dimensions, components of vector a, would
be (ax,ay,az). These components of the vector are independent, meaning the ax on
The page starts off by telling the reader that the process of measuring will always have a certain
degree of uncertainty, resulting in the measurements being uncertain as well. The first concept
is Significant Figures, they refer to the digits of a measur