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Mechanics: Work, ** Energy**, Momentum, Kinematics of Rotational Motion
Jacque Lynn F Gabayno, Ph.D. Lecture Notes
1
Work as defined in Physics
r r W =F s
Force× Displacement = Force × Displacement
*SI Units: 1 N.m = 1 Joules (i.e. same as the unit of

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the particles are held together
- The phase of matter is considered a physical property because a change in a substance’s phase does not change the chemical properties or identity of the substance.
- The phases of matter are determined by the *kinetic*** energy** of the particles and the attractive forces between the particles.
- Attractions between particles, called intermolecular forces.
- The effects of the motion of the particles on these attractions determines the arrangement of the particles in...

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** Energy** of a Tossed Ball Project
PURPOSE:
The purpose for the students of the

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enough to maintain the supercritical flow(high velocity liquid). The results, an abrupt rise occurred in the liquid surface. The rapidly flowing liquid will abruptly slowed and increase in height. This will converting the flow’s *kinetic*** energy** into potential

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direction. Acceleration is increase in speed.
Linear momentum (p) of a single particle (point-like object) in vector notation:
p = m * v.
Specific types of friction:
Drag (wind resistance)
Static (maximum occurs right before the object moves)
** Kinetic** (usually less than static)
F friction = u*N (u is just the coefficient of friction)
Terminal Velocity: you stop accelerating because you’ve reached mechanical equilibrium.
The Action of Forces at Joints
The rigid object is an extended...

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" Factors affecting the speed of sound in a medium"
Type of the medium- The speed of sound is not always the same. Remember that sound is a vibration of *kinetic*** energy** passed from molecule to molecule. The closer the molecules are to each other and the tighter their bonds, the less time it takes for them to pass the sound to each other and the faster sound can travel. It is easier for sound waves to go through solids than through liquids because the molecules are closer together and more tightly...

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-Revolutions* =radians -Revolutions* =degrees
-Radians* =revolutions -Radians* =degrees
-Degrees* =revolutions -Degrees* =radians
-Trigonometry: Sinθ = opposite/hypotenuse; Cosθ = adjacent/hypotenuse; Tanθ = opposite/adjacent
) -** Energy**: joule (J) = kg*(m2
/s) -Gravitational constant G = (6.67x10-11
/s2
)
-Acceleration = m/s2
-Torque = m2
)*[(N*m2
)/(kg2
)]
*kg/s2
/m]
, v=25m/s, d=1337m would be 2 digits because of 25m/s
θ = an angle Sinθ = y/r;...

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at the top of the track, it has the most potential ** energy**, which is the

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evaporation. Evaporation of liquids can be explained in the terms of ** kinetic** molecular model although there are strong molecular attractive forces which hold molecules together. The molecules having sufficient

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Here are a few problems which involve rotational *kinetic*** energy**.
4.1 Maximum Height of Ball
A solid ball is rolled toward a ramp. How high will it be when it stops and begins to roll back down? 11
h Figure 4.1: Ball Rolling Up A Ramp The linear

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