Momentum Vocabulary
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1. a force that increases the net momentum of a system
1. Momentum
2. Impulse
3. External Force
4. Internal Force
5. Law of Conservation of Momentum
6. Elastic Collision
7. Inelastic Collision
8. Perfectly Inelastic Collision
2. a force that does not increase the net momentum of a system. 1. Momentum
2. Impulse
3. External Force
4. Internal Force
5. Law of Conservation of Momentum
6. Elastic Collision
7. Inelastic Collision
8. Perfectly Inelastic Collision
3. Two objects collide, stick together afterward and kinetic energy is not conserved. 1. Momentum
2. Impulse
3. External Force
4. Internal Force
5. Law of Conservation of Momentum
6. Elastic Collision
7. Inelastic Collision
8. Perfectly Inelastic Collision
4. A force that comes from somewhere other than the colliding or pushing off objects 1. Momentum
2. Impulse
3. External Force
4. Internal Force
5. Law of Conservation of Momentum
6. Elastic Collision
7. Inelastic Collision
8. Perfectly Inelastic Collision
5. Two objects collide, remain independent, and kinetic energy is not conserved 1. Momentum
2. Impulse
3. External Force
4. Internal Force
5. Law of Conservation of Momentum
6. Elastic Collision
7. Inelastic Collision
8. Perfectly Inelastic Collision
6. how hard something is to stop
1. Momentum
2. Impulse
3. External Force
4. Internal Force
5. Law of Conservation of Momentum
6. Elastic Collision...

...What is momentum?
Momentum of a body is defined as the mass multiplied by the velocity of this object.
Momentum= m x v
Momentum and Newton’s second law of motion:
The resultant force is proportional to the change in momentum per a second.
We know that force = mass x acceleration. So F (mv-mu)/t
F m (v-u)/t = ma so F=kma
Momentum is a vector quantity:
Momentum has a direction as well as a magnitude
Momentum and Newton’s first law of motion:
An object remains at rest or in uniform motion unless acted upon by a force.
If an object had a constant momentum, it will have a constant amount of force needed to that will mean that no resultant force acting on it. So it will have a constant velocity unless the mass changes.
Momentum key points
Unit of momentum:
Kgms-1
Symbol of momentum:
P
But what is momentum as a physical quantity?
Momentum is the measure of how much force is needed to stop the moving object or change its velocity (speed or direction)
Momentum is found in lots of examples from our everyday lives. To understand what momentum is we look at two colliding objects. Each object is moving with a certain velocity and has...

...M7
Conservation of Momentum
Abstract: This experiment involved the use of gliders on an air track which nearly isolates the colliding system from external forces to create low friction totally elastic and inelastic collisions. Seven different collisions were made, four elastic and three inelastic. The collisions consisted of only two gliders with varying masses and speeds. Each glider cart was equipped with a flag, and its passage through a photogate timer was timed. These measurements will allowed the velocities of the collision partners to be measured before and after they collided with each other. The obtained values do show that initial momentum and final momentum are equal irrespective of their masses and initial velocities. The results show that momentum and kinetic energy of the system is conserved during an elastic collision while only momentum is conserved during inelastic collision. Kinetic energy is not conserved during an inelastic collision. This was found by dividing the final kinetic energy by the initial kinetic and getting a number that was close to one. Which is was fairly close in most cases.
Introduction: The purpose of this experiment is to study the principle of conservation of momentum in collisions using two bodies. The amount of kinetic energy lost in elastic and inelastic collisions is also calculated.
The theory of momentum...

...Laboratory V: Conservation of Momentum
Problem #1: Perfectly Inelastic Collisions
John Greavu
April 17, 2013
Physics 1301W, Professor: Evan Frodermann, TA: Mark Pepin
Abstract
A cart was given an initial velocity toward another stationary cart down a track. The initial velocity of the first cart as well as the masses of both carts was varied throughout multiple trials. Velcro placed on the ends of the carts caused the cars to stick together after colliding. Videos of the collision and the seconds just before and after were taken. Data was then uploaded and plotted in MotionLab were it was used to create construct velocity vs. time graphs for each trial. After analyzing the data and the subsequent graphs the final velocity equation for two objects (each of known mass) that have collided directly head-on in a perfectly inelastic collision was determined as a function of the initial velocities and masses of the two objects.
Introduction
“You work for NASA with a group designing a docking mechanism that would allow two space shuttles to connect with each other. The mechanism is designed for one shuttle to move carefully into position and dock with a stationary shuttle. Since the shuttles may be carrying different payloads and different amounts of fuel, their masses may not be identical: the shuttles could be equally massive, the moving shuttle could be more massive, or the stationary shuttle could have a larger mass. Your supervisor wants you to calculate the...

...laws and principals of mechanics about human performance in order to gain greater in-depth understanding and knowledge about specific details. It is important to have wide understanding of the applications of physics into sport, as physical principles such as motion, resistance, momentum and friction play a part in most sports. Learning about the biomechanics behind a volleyball overhand serve and why we need force, acceleration, gravity, levers and power to produce the most optimum serve. The biomechanics principles are force and motion, momentum, leverage and fluid mechanics.
(http://codysbiomechanisvolleyballblog.blogspot.com.au/)
Force and motion. This principal is found mostly in the sprinting and jumping portions of the serve! When the player sprints, they exert a force against the ground in an angle.
The momentum from the sprint is then transfered to the momentum of the jump (So a fast sprint will result in a high jump) Once a contact is made with the ball, the momentum of the jump is transferred
to the ball. This increases the velocity of the ball, making it go over the net and far into the opposing court! Momentum is being gained through sprint. Momentum is transferred to jump then Momentum is transferred to the ball This principal also plays a vital role when the player lands from their serve....

...Solving Momentum Problems
Momentum:
For lack of a better definition, momentum is a measure of the “oomph” that an object has due to its
motion. The more mass an object has and the more speed it has the more momentum it has. The
formula for momentum is simply:
p=mv
Where p is momentum, m is mass, and v is velocity
Note that momentum is a vector quantity, so it is possible to have negative momentum. Any object that
is moving in the direction opposite that defined as positive will have a negative momentum. You can
also break a momentum vector into components or resolve momentum vectors into a single resultant.
Momentum is a conserved quantity. The momentum of a system will not change unless an outside
impulse is applied to it. If the system remains isolated, its total momentum will not change. That does
not mean that individual parts of a system cannot interact with each other and exchange momentums.
Conservation of Momentum is a basic physics principle that allows us to solve many interesting
problems.
The unit of momentum is a kg•m/s
Impulse:
The only way to change momentum is through impulse. Impulse is an outside force applied for a
specific time. Obviously the harder you push and the longer...

...Chapter 9 IMPULSE AND MOMENTUM
COLLISION PROBLEMS
A tennis ball and racket collision: a microscopic view
COLLISION: FORCE VS TIME GRAPH
A large force exerted during a small interval of time is called an impulsive force.
LINEAR MOMENTUM
The product of the particle’s mass and velocity is called the linear momentum p = mv As a vector quantity, the momentum can be represented in terms of its components: px= mvx py= mvy
ALTERNATIVE FORM OF NEWTON’S SECOND LAW
F = ma = m(dv/dt) = d(mv)/dt = dp/dt Therefore, F = dp/dt i.e. the force can be viewed as the rate of the change of momentum This is a much stronger statement than our previous version F = ma Why?
The version F = dp/dt allows for the possibility that not only the velocity, but also the mass can change! Example: rocket filled with fuel is loosing its mass as it burns the fuel.
IMPULSE
F= dp/dt is a differential equation
tf
It can be converted ∆p x = p fx − pix = into an integral form.
∫ F (t )dt
x ti
Impulse = J x = ∫ Fx (t )dt
ti
tf
Area under the Fx (t) curve betwn ti and tf
IMPULSE
Graphic representation of impulse: Jx is the area under the force graph.
Jx = Favg∆t
IMPULSE-MOMENTUM THEOREM
An impulse delivered to a particle changes its momentum. ∆Px = Jx For one-dimensional motion: pf = pi + Jx Do...

...Aim:
To find out whether momentum and kinetic energy are conserved.
Hypothesis:
Theoretically momentum should be conserved at all times whereas energy is lost if the collision is not a fully elastic one through heat and sound.
Variables:
The Independent variable is the initial and final mass of the trolley. The Dependent variable is the velocity of the trolley.
Procedure:
i) Set up apparatus as shown in the diagram.
ii) Start ticker timer and give the trolley a brisk push.
iii) Drop a book from your hands onto the trolley as it runs beneath.
iv) Run off enough tapes for each member of your group.
v) Measure the mass of your book and the trolley.
Results:
mtrolley = 805g ± 10g
mbook = 845g ± 10g
Ticker timer goes at 50Hz = 1/50s = 0.02s
vi = di / Δt vf = d2 / Δt
di = 5.4cm ± 0.1cm vi = 0.54ms-1
d2 = 1.8cm ± 0.1cm vf = 0.18ms-1
Ek = mv2 / 2
Ek before = 0.117369 J
Ek after = 0.02673 J
Pbefore = Pafter
Pbefore = mv Pbefore = 0.4347 kgms-1
Pafter = (m + m)v Pafter = 0.297 kgms-1
Evaluation and Analysis:
The obtained results don't support my hypothesis since they show that neither energy nor momentum is conserved in this situation. The momentum after the collision decreased by a factor of approx. 1.5 whereas kinetic energy has decreased by almost a factor of 4.5. Due to friction from the table and the ticker timer the measurements taken were not 100% accurate. Friction was the main cause of...

...business world, there are different theories of effective change implementation. The corporation this research focuses on is Duke University Children’s Hospital, which is highlighted in the textbook. The topic of the research paper will focus on the process of implementing change within the hospital. Implementing change within organizations is very relevant to this course. Not only is the course called Leading Organization Change, but the topics we have been focusing on revolve around methods of implementing change. With changes, organizations need to take steps to fully plan the change in order to ensure a smooth transition and acceptance (Spector, 2013). Research will show how Duke University Children’s Hospital assessed the internal and external forces that impacted the change and how they assessed if the organization was ready for change. Also, research will show what model and strategies were used during the organizational change along with an analysis of whether resistance to the change occurred and if so, how it was dealt with. Finally, I will strategize how to handle leading group changes within a similar context.
Often times, financial crises spurs change in organizations. This was the case for Duke University Children’s Hospital. An assessment was made by the key administrators that showed how dire their financial situation truly was due to various reasons. This resulted in the pending elimination of programs and reduced...

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