Chapter 2 Forces To study the effect of forces acting on particles. 2.1 Equilibrium of a Particle 2.2 Free Body Diagram 2.3 Force Vectors 2.4 Forces in a Plane 2.5 Forces in Space Expected Outcomes • Understand the condition for a particle to be in static equilibrium • Able to construct free body diagrams • Able to solve for the forces acting on a static particle 2.1 Equilibrium of a Particle www.classical.com/features 2.1.1 Condition for the Equilibrium of a Particle
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1 1 A wooden block of mass 0.60 kg is on a rough horizontal surface. A force of 12 N is applied to the block and it accelerates at 4.0 m s –2. 4.0 m s–2 wooden block 12 N What is the magnitude of the frictional force acting on the block? A B 9.6 N C 14 N D 2 2.4 N 16 N A submarine descends vertically at constant velocity. The three forces acting on the submarine are viscous drag‚ upthrust and weight. Which relationship between their magnitudes is correct
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science ABN 54 406 994 557 (02) 6583 4333 PO Box 2575 PORT MACQUARIE NSW 2444 FAX (02) 6583 9467 www.keepitsimplescience.com.au mail@keepitsimplescience.com.au keep it simple science Photocopy Master Sheets Years 7-8 FORCES Disk filename = “02.Forces” Copying is permitted according to the Site Licence Conditions only 1 Site Licence Conditions Our product is supplied on CD • You may copy the CD for back-up only. • You may store the CD contents in data retrieval systems
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equilibrium of forces was investigated through the use of different weights attached to cords which were connected to a central ring‚ while pulleys supported them. This assembly facilitated the force band system to demonstrate that equilibrium will be attaining regardless of disturbances. However‚ due to errors in the experiment‚ the sum of the x and y component did equate to zero as predicted. The graphical solution of the experiment yield a polygon that is completed indicating that all the forces are in
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"The Force Table" is a simple tool for demonstrating Newton’s First Law and the vector nature of forces. This tool is based on the principle of “equilibrium”. An object is said to be in equilibrium when there is no net force acting on it. An object with no net force acting on it has no acceleration. By using simple weights‚ pulleys and strings placed around a circular table‚ several forces can be applied to an object located in the center of the table in such a way that the forces exactly cancel
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curve will stay at 12 m/s throughout the entire turn (provided the driver does not brake). The direction of the velocity vector is changing. A force is required in uniform circular motion.Centripetal Force & AccelerationSince an object in motion will travel in a straight line (Newton ’s First Law) an force must be required to accelerate the mass . This force does not cause a change in velocity as stated in the introduction‚ but rather it is responsible for the change in direction. The centripetal
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transcontinental plane flight‚ your coffee cup sits motionless on your tray. Are there forces acting on the cup? If so‚ how do they differ from the forces that would be acting on the cup if it sat on your kitchen table at home? Determine the Concept Yes‚ there are forces acting on it. They are the normal force of the table and the gravitational pull of Earth (weight). Because the cup is not accelerating relative to the ground‚ the forces are the same as those that would act on it if it was sitting on your table
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FORCE AND MOTION Ronald Steven DuBois 5th Grade St. Michael’s Catholic School 2009 TABLE OF CONTENTS 1. Abstract 2. Introduction 3. Background Information 4. Procedure 6. Data and Observations 7. Results 8. Conclusion 9. Bibliography ABSTRACT I thought it would be fun to fling things like raw eggs and rocks with a catapult. Guess what‚ it was! By flinging these items I tried to find out if heavier things would travel farther than lighter
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= 300g 9.8 3. Explain the effect of mass on Hooke’s Law. Hooke’s Law states that the restoring force of a spring is directly proportional to a small displacement. Applying a mass to the end of the spring stretches it‚ changing the length from its original equilibrium position of rest‚ to a new (lower) equilibrium position. At this position‚ the vertical restoring force of the spring balances the weight and the downward pull of gravity is balanced by the upward pull of the spring
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The doctor in "The Use of Force" is very unprofessional. He describes the patient in a very infatuated way. The doctor also abhors the way the parents of the patient referred to him. And the doctor treats the patient aggressively. From the moment the doctor enters the house. He introduces the girl to us in an infatuated sense. He saw her as a "very attractive little thing" and he described her to have "magnificent blonde hair one of those picture children often reproduced in advertising
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