...Statics of Rigid Bodies STATICS OF RIGID BODIES Chapter 1: Introduction Department of Engineering Sciences enter 〉〉 Statics of Rigid Bodies DEFINITION Mechanics • the study of the relationship among forces and their effects on bodies. • the science which describes and predicts the conditions for rest and motion of bodies under the action of forces. • a physical science (for it deals with physical phenomena) Prev Department of Engineering Sciences Jump to… Stop Show Next Statics of Rigid Bodies MECHANICS MECHANICS RIGID BODIES STATICS bodies at rest DYNAMICS bodies in motion DEFORMABLE BODIES INCOMPRESSIBLE FLUIDS COMPRESSIBLE Prev Department of Engineering Sciences Jump to… Stop Show Next Statics of Rigid Bodies What is a FORCE? represents the action of one body on another that tends to change the state or state of motion of a body. may be exerted by actual contact or at a distance (e.g. gravitational and magnetic forces). characterized by its point of application, magnitude and direction. represented by a vector. Prev Department of Engineering Sciences Jump to… Stop Show Next Statics of Rigid Bodies Effects of a FORCE • development of other forces (reactions or internal forces) • deformation of the body • acceleration of the body Applied Force Prev Department of Engineering Sciences Jump to… Stop Show Next Statics of Rigid Bodies Development of other forces ...
Words: 534 - Pages: 3
...------------------------------------------------- Top of FormImperial SG - specific gravity of fluid d - int. diam. pipe or bend (inches)v - velocity of fluid (ft/s)β - turning angle of bend (o)p - gauge pressure (psi)Bottom of Form | The resulting force on a thrust block or anchor depends on the fluid mass flow and flow velocity and the pressure in the bend. Resulting force due to Mass flow and Flow Velocity The resulting force in x-direction due to mass flow and flow velocity can be expressed as: Rx = m v (1 - cosβ) (1) = ρ A v2 (1 - cosβ) (1b) = ρ π (d / 2)2 v2 (1 - cosβ) (1c) where Rx = resulting force in x-direction (N) m = mass flow (kg/s) v = flow velocity (m/s) β = turning bend angle (degrees) ρ = fluid density (kg/m3) d = internal pipe or bend diameter (m) π = 3.14... The resulting force in y-direction due to mass flow and flow velocity can be expressed as: Ry = m v sinβ (2) = ρ A v2 sinβ (2b) = ρ π (d / 2)2 v2 sinβ (2c) Ry = resulting force in y direction (N) The resulting force on the bend due to force in x- and y-direction can be expressed as: R = (Rx2 + Ry2)1/2 (3) where R = resulting force on the bend (N) Example - Resulting force on a bend due to mass flow and flow velocity...
Words: 632 - Pages: 3
...to describe something is called: d) data 2. One-half liter of water has a mass of c) 500 grams 3. considering that a very small portion of a material that is the same throughout with that of a larger portion of the same material, the density of the small sample will be: c) much less 4. A scientific law can be expressed as: d) all is correct 5. When a scientist measure volume as a property of it is to determine: c) how much space an object occupies 6. The mass of water in a 40 Liter aquarium is equal to: b) 40.00 kg 7. A ball rolling across the floor slows to a stop because: b) there is a net force acting on it. 8. If an object is falling near the Earth surface and ignoring air resistance, the acceleration will: b) remain constant 9. If you double the mass of a cart while it is undergoing a constant unbalanced force, the acceleration will: a) decreased by half 10. If an object is falling towards the Earth surface and ignoring air resistance, the velocity will be: a) increasing 11. Motion can be measured in all three variables; speed, velocity and acceleration: b) False 12. The net force on object is regarded as: d) the sum of all the forces acting on the object 13. The second law of motion states that: b) a body of 1.0 kg in mass requires 1 Newton force to accelerate at 1.0 M/S2 14. The momentum of an object is given the product of the mass of the object and its velocity: a) True 15. In the absence of external forces...
Words: 417 - Pages: 2
...To all the things that we do not perceive but are there for us to see are call Environmental Stimulus and we call Attended Stimulus to those things in our environment that catch our attention, the things to which we pay attention. One’s a perception happens we recognize the object or situation another proses began to transform this information into action according to our knowledge. This one is always influence by our knowledge, colors and interest. This information brought to a situation can be something learned time ago or knowledge gained by events previews to the present event. In this subject there are some tools that help us perceive they are call fundamental quintiles. They work thru our knowledge and help us recognize position, mass, or displacement. Example on a play perception of the audience is different than what goes on behind the séance. Behind the séance there are so many thinks going on that we are not aware of. On the other hand for someone when is on the audience and has work as on a play would have a different perception then everyone else, he might see the nerviest from the actors, or would see details that no one else can see. This is because our knowledge changes the perception of what we see or hear. In this example we see that the Environment stimulus is all thinks that we can potentially perceive like the trees or flowers. Aon the other hand the attended stimuli would be the bear. The process is constantly repeated all the time, our body gas sensors...
Words: 922 - Pages: 4
...Key Air Force Leadership Message Briefing INTRODUCTION Attention: How many of you every time you use the restroom you remember to cut off the light? Purpose/Motivation: I’m standing her to brief you about Energy Awareness in the Air force not just cutting off the lights when you leave a room but a Multidimensional approach to energy efficiency Overview: I’ll cover our main mission which is to fly, fight and win in the air, space and cyberspace, our Air Force Facilities, and the overall culture change Transition: The Air Force doesn’t just care about energy for energy’s sake we care about how it affects the mission of the air force BODY MP1 Fly, Fight and Win * Aviation Fuel and Facilities cost us about 9 billion per year * Through Programs like AFSO 21 1. “token offload fuel” 1000 pounds to 100 pounds Transition: Just fixing are fuel issues aren’t just it are energy cost as a whole is the highest in the DOD MP2: Air Force Facilities * Wind energy of Cape Cod * Solar Energy * Smart facilities * Are views as af Transition: I never in my wildest dreams thought energy efficiency was so important and how it effects each and every one of us CONCLUSTION Summary: I talked to you about the potential of Energy Awareness how we plan to implement fixes for fuel and facilities and how opinions are important Re-Motivation: we must continue to find ways to save money because we are a smaller AF, Reducing demand, Increasing...
Words: 283 - Pages: 2
...Activity 6 - Critical Angle Jairrus Publico1*, Reinner Pagayon2, Clauzette Lofamia3, Jessamine Draper4 National Institute of Physics, University of the Philippines, Diliman, Quezon City *Jairrus Publico: theusername125@gmail.com Abstract This paper discusses how to determine the coefficient of static friction by finding the critical angle between two different surfaces in contact on an inclined plane. It aims to determine the coefficient of static friction between two surfaces in an inclined plane by measuring the critical angle θc, the steepest angle of incline in which the mass in contact does not slide. This paper also aims to show the relationship between the materials in contact and the effect of their masses to the critical angle θc. The experiment also shows the accuracy of using Newton's second law in measuring the coefficient of static friction. Keywords: static friction, coefficient of static friction, critical angle 1. Introduction Friction is the force that opposes motion. It is the resistance of surfaces moving against one another. It is a force that plays a very important role in our lives. Without it, we cannot walk, do our daily chores, and even slide endlessly due to external forces. This phenomenon remained unknown to the early people until Leonardo Da Vinci (1452-1519) studied and analyzed its importance in machines. He observed that different materials in contact move with varying ease. He stated the following laws; first, the...
Words: 1666 - Pages: 7
...dictionary, physics is the science of matter and energy and of interactions between the two. In all physics consists of energy, kinetic energy, potential energy, velocity, acceleration, mass, force, and gravity. Without physics many things would not be possible. In fact, when a person is driving their car they are suing momentum (the quantity of motion of a moving object) and acceleration. Over time our general understanding of physics has helped us develop greater technology than society thought possible. For example, many years ago society believed that flight was impossible until two brothers, the Wright brothers, invented the aircraft. Now of course that was with many trial and errors. According to Bernoulli principle an increase of a flow results in a decrease of pressure. When air hits the leading edge the airflow above the wing travels faster than the flow below the wing. So therefore, the pressure below the wing will be higher than the air pressure above the wing. Because of this difference in pressure, lift is created, and pushes the wings upward. Be that as it may, this is not the only physics principle at work One must also apply Newton’s 1st (every body remains in a state of rest or uniform motion unless it is acted upon by an external unbalanced force), 2nd (a body of mass subject to a force undergoes an acceleration), and 3rd law (for every action there is an equal and opposite reaction). As one can see physics applies to many things in...
Words: 295 - Pages: 2
...Sara Gutierrez De Piñeres Conclusions: Length vs. Period: By looking at the graph of Length vs. Period one can conclude that as the length gets longer the period will increase. When two pendulums have different lengths but the same amplitude, the shorter pendulum will have a smaller arc to travel through. Because the distance the mass travels from maximum displacement to equilibrium is less while the acceleration of both pendulums remains the same, the shorter pendulum will have a shorter period. Mass vs. Period: The graph done in class can show how the change in mass does not affect the period. An example that can demonstrate this kind of behavior is when the bobs of two pendulums differ in mass, the heavier mass provides a larger restoring force, but it also needs a larger force to achieve the same acceleration. This is in some way similar to the situation for objects in free fall, which all have the same acceleration regardless of their mass. Because the acceleration for both periods is the same, the period for both is also the same. Amplitude: The graph recorded shows how the amplitude does not affect the period of a pendulum either. When the amplitude of a pendulum increases, the restoring force also increases proportionally. Because force is proportional to acceleration, the initial acceleration will be greater. However, the distance this pendulum must cover is also greater. If you consider small angles, for example, the effects of the two increasing quantities...
Words: 256 - Pages: 2
...To day doctors are using Body Mass Index as the guide lines. One pound of body fat is same as one pound of butter. You can buy various kind of butter with calorie level of 3000 to 3600. 1500 to 1800 is very low daily intake. Most show 2000 to 4000. Again each individual is different, it depends on the metabolism of the individual. Say a person needs 2000 calories per day, and a person is over weight by 20 pounds only. Then by reducing the intake by 200 calories it will take him 15 to 18 days to loose 1 pound. So it will take about 1 year to loose all the weight that the person needs to loose. If every thing is correct but say the person also engages in an additional activities besides reducing the calories, say runs 1 mile and that burns 200 calories then it will take only 6 month to achieve this goal. By the way most diets for weight reduction are around 1500 calories. If a person goes on a diet with less then 1200 calories, the person will gain weight, but will feel sleepy and weak. Body actually shuts down, and conserves energy. ************************************** Life Style Change Program for Loosing Weight By minootoo Who needs to loose weight? Answer is simply not every one, only the over weight person. Who is over weight? This is simple, it is easy to find out and it is available on line, it is call Body Mass Index, and calculations are simple. According to this calculation if you find your self say only 10 pounds more, you may not be over...
Words: 1558 - Pages: 7
...Creativity and Business Innovation Prof. Stefan Meisiek Case Analysis of Critical Mass : The IT Creativity Challenge Piyush Choudhary 2013962348 Executive Summary Critical Mass is a highly successful digital marketing service firm with a its major clientele part of the Fortune 500 group. The Internet industry of which Critical Mass is a part is changing a lot. The social media tools have created a generation that has access to a lot more information. Consumers are becoming highly demanding in making creativity and innovation a must for the success of Critical Mass Inc. The company had invested a lot of resources to achieve a so called creativity inducing environment and organized a plethora of activities to ensure that the creative juices kept flowing. At this juncture the company is at the crossroads to take its next step towards a significant expansion in its client base. As a result Brian Kramer (Tech Director) and Gordon Bunk (Senior VP and MD) have decided to inspect and revaluate the current practices followed in the firm to determine whether they were having the required effect make necessary changes to make them more meaningful and result oriented. 1 |Page Creativity and Business Innovation Prof. Stefan Meisiek Introduction Critical Mass was setup in 1995 by Ted Hellard and Michael Clairo with the intention of being a interactive golf CD-ROM development company. As a part of the plan Hellard went to pitch his interactive golf CD-ROM to Mercedes Benz ,however...
Words: 1824 - Pages: 8
...Whale Rider was a movie produced in 2003, and it is about a girl named Paieka, or Pai. She is the granddaughter of Nanny Flowers and Koro. In the beginning of the movie, Koro has a good relationship with Pai. He brings her to school everyday by giving her a ride on his bike, and everything is good between them. Later on in the movie, Koro is worried about the rest of his people since they are drifting away from the traditions. People are smoking, the men are drinking and shooting pool, and the children do not take the ancestor celebrations seriously. Koro realizes that there is going to have to be a new leader, but his only option would be to have his granddaughter be leader, which goes against tradition. Pai is determined to prove to Koro that she could be a good leader even though she is female, and throughout the film, she tries to get Koro to acknowledge that she would be the best option for leader. Koro starts a school for the boys to find out who would be the best leader out of all of the boys in the village. He does numerous things with the boys to train them to be a chief, and Koro is planning to eventually pick the best leader out of everyone that he is teaching. Koro does not allow Pai to learn how to be chief in his training school since she isn’t a man. Pai learns how to stick fight from her uncle, and eventually defeats a boy in a stick fight. Koro saw this, and yelled at Pai for it, since that is not what women are supposed to do. Pai later wrote...
Words: 978 - Pages: 4
...Proteins - essential to growth and repair of muscle and other body tissues Fats - one source of energy and important in relation to fat soluble vitamins Carbohydrates - our main source of energy Minerals - those inorganic elements occurring in the body and which are critical to its normal functions Vitamins - water and fat soluble vitamins play important roles in many chemical processes in the body Water - essential to normal body function - as a vehicle for carrying other nutrients and because 60% of the human body is water Roughage - the fibrous indigestible portion of our diet essential to health of the digestive system What are the daily energy requirements? Personal energy requirement = basic energy requirements + extra energy requirements Basic energy requirements (BER) includes your basal metabolic rate (BMR) and general daily activities For every Kg of body weight 1.3 Calories is required every hour. (An athlete weighing 50Kg would require 1.3 × 24hrs × 50Kg = 1560 Calories/day) For a calculation of your BMR, see the calculator on the Resting Daily Energy Expenditure (RDEE) page Extra energy requirements (EER) For each hours training you require an additional 8.5 Calories for each Kg of body weight. (For a two hour training session our 50Kg athlete would require 8.5 × 2hrs × 50Kg = 850 Calories) An athlete weighing 50Kg who trains for two hours would require an intake of approximately 2410 Calories (BER + EER = 1560 + 850) Energy Fuel Like fuel...
Words: 363 - Pages: 2
...heights of the incline and then investigate how the final velocity depends on its initial release height and what the relation between the work and the change in kinetic energy. EK1=0 EK2=1/2mv2 The work is done by the x-component of gravity. W=mgsinθ×L=mgH ( unit is kg·m/s2·m=kgm2/s2) v2-0=2as v2=2as=2gsinθ×L=2gH v= (2gH)1/2 The final velocity depends on the height. It is not necessary related with the angle and mass. EK2=1/2mv2 (unit is kgm2/s2) EK2-EK1=1/2mv2-0=1/2m·2gH=mgH W=EK2-EK1 The work done by the gravity on the cart is equal to the change in kinetic energy. Procedure: 1. Practice: Vary track angles, release heights, and cart masses. And then release the cart form the rest. During each trial, measure the time when the cart reaches to bottom of the incline. 2. Vary release heights: Set the track angle which is 4.9° and the mass which is 190g. Release the cart from three different heights and take video for all of them. Data: H1=24cm, L1=153cm sinθ=0.157 θ=9.02° H2=13cm, L2=153cm sinθ=0.085 θ=4.9° 1. Practise: Change angles θ | 4.9° | 9.02° | t | 1.68s | 1.72s | Change masses m | 190g | 210g | t | 1.68s | 1.70s | Change heights L | 100cm | 120cm | t | 1.68s | 2.11s | 2. Vary height (set θ=4.9°, m=190g) L=60cm L=100cm ...
Words: 745 - Pages: 3
...– Motion and Gravity There are two parts for this activity. You will work on both parts described below and also comment on one other student’s work. The first part is to learn how a net force causes acceleration, described by Newton’s second law F = ma. Read the Introduction and Objectives to understand the concept. In Lesson 1, you will see this simulation page: [pic] Play with this simulation by choosing three different masses (AVOID CHOOSING THE SAME MASS USED BY OTHER STUDENTS) . By clicking the button “Push”, you will produce a speed vs time graph (do it for three different masses), and then use F = ma to calculate the acceleration for each mass. Record the mass and acceleration values in the table below: |Mass 1 = 120 |a1 =.83 (100/120) | |Mass 2 = 180 |a2 =.55 (100/180) | |Mass 3 =300 |a3 =.33 (100/300) | Now you should have three straight lines in the graph. Each calculated acceleration should represent the slope of the corresponding line. Take a screen-shot of your graph image and then paste it here。 Use your graph to determine the slopes and compare it with three acceleration values in your table. [pic] The second part is study Newton’s...
Words: 530 - Pages: 3
...ORGANISATION STRUCTURE AND DYNAMICS Assignment on Personal Change Submitted to: Prof. Milind Agnihotri Submitted by:- Nisha Bathija 65152 Personal Change Goal: - To exercise regularly and to stop eating junk food. Driving Forces: * To be determined towards achieving my goal * Waking up early and on time * Eating right * Following a fixed schedule Restraining Forces: * Inherent laziness * Lack of commitment * Attraction towards junk food * Lack of self discipline Ratings given in order of importance (A being the most Important followed by B and C): Driving Forces * Being determined (A) * Waking up early (A) * Eating on time (B) * Following a fixed schedule (B) Restraining Forces * Plain lazy (A) * Commitment towards achieving the goal (B) * Restraining from junk (B) * Self Discipline (B) Action Strategy: For increasing my driving forces, I would: * Be optimistic about achieving my goal * Try and sleep early and wake up early * Eat “Right” For decreasing my restraining forces, I would: * Get less attracted towards junk food * Get self disciplined * Increase my commitment level towards achieving my goal. To start with I would first like to tell you why I chose “Losing Weight” as my goal. It all started in the first trimester where we the students of FSB 1 had to decide which Sport option we would like to opt for. I being an athlete in school chose Mixed Martial...
Words: 852 - Pages: 4
