Cycle 1 Review Sheet, Part 1 25 August 2014 From time to time this semester I will hand out a “review sheet” which is a condensed summary of what I consider some of the more important topics and key concepts from the lectures. Remember in this class, the lectures define the range of content that you are responsible for, not the text. This is especially pertinent because of the cyclical nature of the class. If I indicate a point here in a review sheet this means that this is something I want to emphasize. 1-D Kinematics: Definitions: vave ≡ ∆x ∆t Definition of average velocity, defined over an interval. v ≡ dx dt Definition of instantaneous velocity. aave ≡ ∆v ∆t Definition of average acceleration, defined over an interval. a ≡ dv dt = d 2x …show more content…
For this part of the course we will apply Newton’s Law in one dimension at a time only. We will generally use the Cartesian subscripts “x” or “y” to indicate the relevant dimension we are considering. For example when we want to talk about the component of the net force in the x-direction, we represent this as the vector component Fx. Note that we never put little arrows on components. We can just write the 1-D version of Newton’s Second Law: Fx = max where ax is the acceleration defined positive in the x-direction. Finally note that the variable m what is called “mass” refers to the inertia of a body. In other words m tells you how hard it is to acceleration something. It’s harder to get a freight train to accelerate than it is to get a mosquito to accelerate. We always call m the mass, not the weight. Newton’s Third Law: Law of Action-Reaction: If there exists a force on body A due to body B: F~ AB then the body A must also exert a force F~ BA on body B so that these two forces have the same magnitude: FAB = FBARevised Physics 121 Fall 2014 Document #05 – Cycle 1 Review Sheet, Part 1 page 5 of
An excerpt from “CQ Researcher” wrote a summary that focuses on how Millennials is one of the most diverse generations of America 's, leading them to possibly reshape our country in their image. The first time I read this, I thought that young adults may not have what it takes to change America’s society. That they didn’t know how, but then you have Millennials vote for President Obama which in fact were most hispanic people, we may have a shot. According to the “CQ Researcher” “ Millennials launch into successful adulthood, causing many to delay getting married, starting families and purchasing a home. This is good because setting back with marriage and families, gives enough time for an individual to understand our country and what is the
In addition, the acceleration will be directly proportional to the magnitude of the net force and inversely proportional to its mass. b) Explain Newton 's Second Law as if you are talking to a friend: When an object is pushed (applying a net force) so that it moves, the object will move towards the direction of the push (net force). Additionally, its acceleration will increase with an increase in the force applied and vice versa. Conversely, an object of a larger mass will move slowly and vice versa. c) Real-world example of Newton 's Second Law:
Criteria for considering studies for this review We included any type of study design with data collection. There was no age restriction and we included studies looking at patients presenting with fever who were subsequently tested for dengue using both the Tourniquet test and Enzyme-Linked Immunosorbent Assay (ELISA). For this review: Dengue fever was considered: “Fever along with at least 2 of the following: headache, retroorbital pain, muscle pain, joint pain and rash.
The factors weight, size, and velocity are depended on by the magnitude of the lift. So it is saying that other smaller forces depend on the lift which
= MOMENT OF INERTIA X ANGULAR VELOCITY The angular velocity is the axis, the moment of inertia is the resistance to change, and the angular momentum is the product of the body’s moment of inertia. 4.3.10 -Angular momentum is conserved when there is no torque. This can determine the movement for angular acceleration about
A list of the given concepts and a description of how I learned them. 1. The first section of chapter one which was about Sets of Real Numbers and the Cartesian Coordinate Plane" was easy to understand. It only took about two readings for me to understand the concepts.
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Rene Descartes, a French philosopher and scientist came up with the theory and concept of momentum. Descartes idea of momentum came from his idea of trying to quantify “amount of motion.” That became the purpose of the equation we have today for linear momentum. We do, however, have Sir Isaac Newton to thank for the laws of motion and in this case the second law of motion, which relates impulse to momentum founded in 1966. Isaac Newton’s most famous claim to fame, however, is the theory of gravity that he established when an apple hit him on the head as he was sitting under an apple
The equal force causes you to move backwards in the opposite direction of the force you applied. Newton’s second law of motion can also be easily proved with arguments in the real world. According to the second law of motion, the total force is equal to the mass of an object times the acceleration. So in theory, an object of larger mass will need more force to accelerate it. This can be easily proven in everyday life, as if you have a car with a mass of 25kg and a truck with a mass of 50kg both going at the same speed, you will need more force or human strength to push the truck because it is heavier.
Weight is the downward force caused by the gravitational attraction of the Earth. 3. What does the design have to do with the kite’s ability to fly? - A kite is a heavier than air object that flies.
The first law was the law of inertia, which was already explained. The second law of motion was published in 1687, in which he formalized the description of how massive bodies move under the influence of external forces. This expanded on Galileo's idea who developed the first accurate laws of motion for masses. The second law says that when a constant force acts on a massive body, it causes it to accelerate. If an object is in motion prior or the situation is observed from a moving inertial reference frame, that body may appear to speed up, slow down, or change direction.
The Law of Conservation of Mechanical Energy that states potential energy cannot be created or destroyed, but is rather converted to kinetic energy and/or sound energy as stated by Viegas (2004,
As long as the mass of an object is constant, increasing the force exerted onto it will also increase its acceleration”. In simpler terms, the second law is represented through the mathematical equation: F=ma. This is also translated to force equals mass times acceleration. For example: When I was pushing a box with 15 books, which weighed 20 kg l had to apply a specific force to get it moving, but when I pushed a box with 25 books, which weighed 42 kg, I had to apply twice the force I was applying on the first box because it was two times lighter. Thanks to this law we have the mathematical explanation.
The 3rd law is the law of Action Reaction. This law stated that for every action there is an equal and opposite reaction. These are the laws of motion that lie at the core of
It states that for every action there is an equal and opposite reaction. This law significantly helped our society in the engineering area. Planes and rockets fly thanks to the principle stated in this law. A perfect example of this is Spacecraft. Spacecraft’s are incredibly heavy and require an incredible amount of force to get them airborne and maintain.