...Force & Motion The First Law: Force and Inertia Object remains at rest will remain at rest unless acted upon by unbalanced force. Object in motion will continue at constant speed and motion unless acted upon by unbalanced force. Force is an action that can change motion. A force is what we call a push or a pull, or any action that has the ability to change an object’s motion. Forces can be used to increase the speed of an object, decrease the speed of an object, or change the direction in which an object is moving. Classification of Forces 1. Effects on motion- Balanced forces produce no motion or motion with constant velocity, while unbalanced force produce accelerated motion. 2. Line of Action- Parallel forces may go in the same direction or in opposite directions while Concurrent forces are those that meet at a point. 3. Relations to Work- Conservative forces are those that can do work and can stores energy. Non conservative are forces that can do work but cannot store energy. 4. Interaction of Bodies- Contact force when object is push by another & Distant force no contact between objects. Equilibrium 1. Stable- line passed through its center of gravity falls within the base. 2. Unstable- line dropped through the center of gravity does not fall with in the base. 3. Neutral- Does not change the center of gravity with slight tipping. Inertia is a term used to measure the ability of an object to resist a change in its state of...
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...P 251 Force Activity 1-1: Introduction to Force Procedure: 1. Place one end of a rubber band around the vertical rod on your table. 2. Stretch the rubber band to a length of 10cm beyond its unstretched length, L0. [pic] 3. Place two rubber bands around the rod and stretch them together a length of 10cm Question 1-1: How does the combined force of two rubber bands compare to the force of just one rubber band? 1. Repeat with 3, 4 5 rubber bands. Activity 1-2: Measuring Force with a Force Probe Open file L03A1-2a (Measuring Force.ds) Procedure: Note: The Force Probe is attached to a cart. 1. Zero the Force Probe. (With nothing attached to the Probe press "Start" on the control panel and observe the force. If it is not zero press the small button "TARE" on the side of the Sensor and confirm that the force measurement is now zero. If the Force Probe still registers a nonzero force contact your instructor.) 2. Measure the unstretched length of one rubber band and record here: Lo=________ 3. Place one end of the rubber band around the vertical rod on the stand. 4. Attach the Force Probe hook to the free end of the rubber band. See Figure 1A on the next page. [pic] Figure 1A 5. Click "Start" and pull the Force Probe horizontally to stretch the rubber band 10cm (10cm beyond the unstretched length). See Figure 1B below. [pic] Figure 1B 6. Select the statistics feature [pic] and determine the mean value of the force. Record the...
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...Porter’s Five Force Model There are some different approaches available when measuring the profitability in a market, or industry. I choose to use the model by Michael E. Porter, where the profitability potential of an industry, described as the long run return on investment, is reliant on the degree of competition in the selected industry. The five forces that Porter mentions are; threat of entry, supplier power, buyer power, threat of substitutes and industry rivalry. Threat of entry The threat of new entrants into the market segment dominated by RIM is quite high. All the established companies in the mobile industry are possible entrants to the diversified communication services industry of RIM. Although RIM has up-to-now been able to take full advantage of its technological dominance in the market , there still remains the possibility of new companies to enter using older versions of the technology in a modernized and revamped way. A recently entrant to the market is Apple corp. with its iphone. Because of the dominance of RIM in its own lucrative segment it will always face the threat from new entrants. Supplier power The bargaining power of suppliers in the manufacturing face is considerably low in this industry, for instance, processors of the same architecture used by RIM is produced by many companies such as Intel, Freescale Semiconductor, Texas Instruments, Royal Philips Electronics, Samsung and STMicroelectronics. However, as I mentioned earlier there are...
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...| |[pic] | |MARIA JOSE PAZ CORADO | | |Datos Personales | | | |Nombre: María José Paz Corado | | | | | |No. Identificación: A-1 1204242 | | | | | |Dirección: 43 Calle “A” 6-92 zona 12 Monte María III, | | |Guatemala, C.A. | | | | | |Teléfonos: 58346620 ...
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...KINEMATICS 1. INTRODUCTION TO KINEMATICS Dynamics is the study of moving objects. The subject is divided into kinematics and kinetics. Kinematics is the study of a body’s motion independent of the forces on the body. It is the study of the geometry of motion without consideration of the causes of motion. Kinematics deals only with relationships among the position, velocity, acceleration, and time. Kinetics deals with both forces and motion. 2. PARTICLES AND RIGID BODIES Bodies in motion can be considered particles if rotation is absent or insignificant. Particles do not possess rotational kinetic energy. All parts of a particle have the same instantaneous displacement, velocity, and acceleration. A rigid body does not deform when loaded and can be considered as a combination of two or more particles that remain at a fixed, finite distance from each other. 3. COORDINATE SYSTEMS The position of a particle is specified with reference to a coordinate system. A coordinate can represent a position along an axis, as in the rectangular coordinate system or it can represent an angle, as in the polar, cylindrical, and spherical coordinate systems. In general, the number of degrees of freedom is equal to the number of coordinates required to completely specify the state of an object. If each of the coordinates is independent of the others, the coordinates are shown as holonomic coordinates. 4. CONVENTIONS OF REPRESENTATION ...
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...1-dimensional motion of objects. In Unit 2 of the Physics Classroom Tutorial, we learned how Newton's laws help to explain the motion (and specifically, the changes in the state of motion) of objects that are either at rest or moving in 1-dimension. Now in this unit we will apply both kinematic principles and Newton's laws of motion to understand and explain the motion of objects moving in two dimensions. The most common example of an object that is moving in two dimensions is a projectile. Thus, Lesson 2 of this unit is devoted to understanding the motion of projectiles. A projectile is an object upon which the only force acting is gravity. There are a variety of examples of projectiles. An object dropped from rest is a projectile (provided that the influence of air resistance is negligible). An object that is thrown vertically upward is also a projectile (provided that the influence of air resistance is negligible). And an object which is thrown upward at an angle to the horizontal is also a projectile (provided that the influence of air resistance is negligible). A projectile is any object that once projected or dropped continues in motion by its own inertia and is influenced only by the downward force of gravity. By definition, a projectile has a single force that acts upon it - the force of gravity. If there were any other force acting upon an object, then that object would not be a projectile. Thus, the free-body diagram of a projectile would show a single force acting downwards...
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... Air resistance Problems Back to Top Below are given some problems based on air resistance which may be helpful for you. Solved Examples Question 1: A plane moving with velocity of 50 ms-1 has a force constant of 0.05. Calculate its air resistance. Solution: Given: Velocity of air v = 50 ms-1, Force constant c = 0.05 The force constant is given by F = cv2 = 0.05 × 2500 = 125 N. Question 2: An object is traveling at 20 ms-1 experiences a force of 50 N. Calculate the force constant. Solution: Given: Velocity of air v = 20 ms-1, Force F = 50 N, The force constant is given by c = F/v² = 50/20² = 0.125 http://formulas.tutorvista.com/physics/air-resistance-formula.html#air-resistance-problems http://physics.tutorvista.com/motion/projectile-motion.html • PhysicsMotionProjectile Motion Top Projectile Motion The motion of object in two dimensions is explained by two main principles that are kinematic principles and Newton's laws of motion. The motion in two dimensions is called the motion of projectiles. The projectile object is one on which is moved under the force of gravity. Some examples of projectiles are like an object is dropped from its rest condition on which there...
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...Four fundamental forces: Strong nuclear (strength: 10^38) (Range: less than 10^-15) -Force that holds protons and neutrons together in a nucleus of an atom Electromagnetic (strength: 10^36) (Range: infinity) -Force caused by electric charges Weak nuclear (strength: 10^25) (Range: less than 10^-18) -force responsible for interactions involving elementary particles such as protons and neutrons Gravitational (strength: 1) (Range: infinity) -force of attraction between all objects *All of them have an effect of attraction and repulsion except for gravitational which only has an effect of attraction. Other Forces Normal Force: force perpendicular to the surfaces of the objects in contact Friction: force between objects in contact and parallel to contact surfaces Tension: force exerted by string, ropes, fibers and cables *Friction is opposite of applied force, tension is on the same side as friction *gravity and normal force are opposite except on a hill Symbols Fg force of gravity FN normal force Ff friction FT tension FA appiled Dynamics: study of the causes of motion First law of motion/Law of Inertia If the net force acting on an object is zero, the object will maintain its state of rest or constant velocity -objects at rest remain at rest - objects in motion tend to remain in motion -if velocity of an object is constant, the net external force acting on it will also be zero *icy highway example ...
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...NEWTON’S THREE LAWS OF MOTION Newton’s Three Laws of Motion Clare Terese R. Zapata Amazing Grace School San Vicente, San Pedro, Laguna ___________________________________________________________________ A Scientific paper submitted in partial fulfilment of the requirements in Science 8: Physics under Mrs. Jenny N. Liwanag, S.Y. 2013-2014 NEWTON’S THREE LAWS OF MOTION Introduction Galileo Galilee is the person who provide the experiment on how to describe motion. But Sir. Isaac Newton was the one who answered how an object moves. Newton is the one who introduce the three statements we now know as Newton’s Three Law’s of Motion. The First Law of Motion tells how “an object at rest tends to stay at rest and an object in motion stays in motion, unless acted upon by an external force”, this law is called “Law of Inertia” The second Law of motion tells about acceleration, it pertains to the behavior of an object if there is no balance or if the force in not zero, this law is called, “The Law of Acceleration”, it is stated that, “The Acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force , in the same direction as the net force, and inversely proportional to the mass of the object”. And the Third Law of Motion is called, “The Law of...
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...Leaving Cert Physics Long Questions: 4. Circular Motion and SHM (all higher level) Remember to photocopy 4 pages onto 1 sheet by going A3→A4 and using back to back on the photocopier 2015 - 2002 Solutions begin on page 7 Circular Motion 2012 Question 12 (a) An Olympic hammer thrower swings a mass of 7.26 kg at the end of a light inextensible wire in a circular motion. In the final complete swing, the hammer moves at a constant speed and takes 0.8 s to complete a circle of radius 2.0 m. (i) What is the angular velocity of the hammer during its final swing? (ii) Even though the hammer moves at a constant speed, it accelerates. Explain. (iii) Calculate the acceleration of the hammer during its final swing (iv) Calculate the kinetic energy of the hammer as it is released. 2011 Question 6 (c) A simple merry-go-round consists of a flat disc that is rotated horizontally. A child of mass 32 kg stands at the edge of the merry-go-round, 2.2 metres from its centre. The force of friction acting on the child is 50 N. Draw a diagram showing the forces acting on the child as the merry-go-round rotates. What is the maximum angular velocity of the merry-go-round so that the child will not fall from it, as it rotates? If there was no force of friction between the child and the merry-go-round, in what direction would the child move as the merry-go-round starts to rotate? 2006 Question 6 (i) Define velocity. (ii) Define angular velocity. (iii) Derive the relationship...
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...Forces and Motion For Students of Baldwin Wallace College Spring Semester 2011 Monday – Wednesday 10:00 – 11:15 am Room 139 Wilker Faculty Richard Heckathorn The materials for this course were organized and edited by Richard Heckathorn using materials from a program called Operation Physics and includes materials developed by him. The original OPERATION PHYSICS activity sequence to improve physics teaching and learning in upper elementary and middle schools was funded by the National Science Foundation. Original Material Copyright 1992 by American Institute of Physics Materials edited and photoduplicated with permission. FORCES & MOTION INTRODUCTION WORKSHOP LEADER’S TOPIC INFORMATION INTRODUCTION TO FORCES & MOTION An understanding of force and motion is fundamental to the study of almost all other physics-related topics. Yet it is a topic often overlooked or only cursorily introduced in elementary and middle school science, even though it is a topic typically identified for inclusion in the curriculum for these grades. A primary reason for this is that many teachers do not feel comfortable about their own understanding of the topic. Consequently, this may be the most needed of all of the OPERATION PHYSICS workshops. This workshop leader’s notebook is divided into two parts: PART ONE Motion Part One begins by introducing participants to the concepts of space and time....
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...will push against the initial action in an equal amount of force. This is present in every force acted upon an object, surface or matter. As a result if an object has force applied to it will receive the same amount of force from the opposite direction (re-action). The rocket pushes downwards to the ground using its the force generated from its engines (action). The reaction of the initial force causes the ground to push the rocket upwards with an equal amount of force. The first law of motion discovered by Isaac Newton was the law of Inertia. This law posed the principle that an object requires an unbalanced (external) force to act upon it in order to be in motion. If an object is static or inert it will remain in this state until an unbalanced (external) force will act upon it. If an object is in uniform motion and continues to move in the same speed, in the same course it will maintain this rate unless an unbalanced (external)force is acted upon the steady object. If no unbalanced force is applied to the object then the object will sustain its uniform state of motion. Acceleration is caused by force acting on an object with mass. As a result acceleration is effected by the mass of which force is applied to. The larger the mass of the object of which force is applied, the more force is required in order to accelerate the object initially. The calculation of force is identified by this equation: FORCE = MASS x ACCELERATION For example: Badr pushes the 1000kg...
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...Santo Tomas Faculty of Engineering 1stSem SY 2015-2016 Experiment No. 7A & 7B Centripetal Force on a Pendulum and Centripetal Force Section: 2-3 Date Performed: October 22, 2015 Group No.: 4 Date Submitted: October 29, 2015 Leader: Kristopher Flores Members: YnakiDizon Raine Go Bryan Infante WilverInteria Instructor: Engr. Rose Ann Tamolang Objective To study and apply Newton’s 2nd law of motion and identify the forces involved in uniform circular motion. Discussion of Related Physics Concept An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This law is often called "the law of inertia". This means that there is a natural tendency of objects to keep on doing what they're doing. All objects resist changes in their state of motion. In the absence of an unbalanced force, an object in motion will maintain this state of motion. According to Newton's second law acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object). Everyone unconsiously knows the Second Law. Everyone knows that heavier objects require more force to move the same distance as lighter objects. Newton's second law was used to analyze a variety of physical...
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...as the bucket advances downwards. When this happen, another marble is released. A pulley is a simple machine that consists of a wheel on an angle, which allows a rope to glide smoothly along it, allowing the object to be lifted easily. This step relates to the physics content because it corresponds to forces. When a free body diagram of a...
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...Fundamental laws of Mechanics Contents • The concepts of displacement (位移), velocity, acceleration, angular velocity, angular acceleration and angular momentum (角动量) • Newton’s laws of motion, rotational laws, • Conservational (守恒的) laws of momentum, energy and angular momentum §2.1 The motion of Point masses 2.1.1 Displacement and equation of motion When a particle is moving in space, it changes its position with time. Generally, the motion could be described by a function of time. For example, a particle moves along x-direction in a constant speed v, its position can be written as x = vt + x0 ( x(t) (2.1) x0 can be determined by the initial condition. If the particle moves in a three dimensional space, its path at time t can be described by the following equation: r(t) = x(t) i + y(t) j + z(t) k (2.2) r (r(t) (2.3) where r denotes vector [pic] and same for i, j, and k. Quite a few books used such bold form letters as vectors for simplicity. At the time of t+(t, r(t) becomes r(t+ (t). The change of its path during the interval (t is given by (r = r(t+ (t) - r(t). (r(t) is called the displacement of the particle in (t period. It also has three components in x, y and z directions. r(t) is called the equation of motion for the particle. 2.1.2 Velocity and Acceleration 1. Instantaneous velocity and acceleration Fig. 2.1 The displacements The average velocity of the particle during...
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