multiple measurements can be taken and then averaged e.g. Period of a pendulum = Time for 10 oscillations / 10 1.2 Speed‚ velocity and acceleration Core • Define speed and calculate speed from total distance / total time Symbol Definition SI unit Vector / Scalar Speed v or u Speed = total distance / total time m/s Scalar • Plot and interpret a speed/time graph or a distance/time graph • Recognise from the shape of a speed/time graph when a body is – at rest – moving with constant speed – moving
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Chapter 11 Rolling‚ Torque‚ and Angular Momentum In this chapter we will cover the following topics: -Rolling of circular objects and its relationship with friction -Redefinition of torque as a vector to describe rotational problems that are more complicated than the rotation of a rigid body about a fixed axis -Angular momentum of single particles and systems of particles -Newton’s second law for rotational motion -Conservation of angular momentum -Applications of the conservation of angular
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earthquake-induced vibration of long-span bridges has been a problem of great concern. The concept of varying the normal force in a frictional interface is investigated to enhance the energy dissipation from a vibrating structure and improve the seismic performance of bridge structures. A semi-active optimal control algorithm is formulated to determine the controllable clamping force of a variable friction device; this algorithm uses measurements of the absolute acceleration and device relative displacements
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situation in a car accident‚ what will happen to the passenger and the other people in the back seat? What will happen to the car after the crash? Will the people survive or die? There are many questions to answer in this essay. Body of Essay: The force on an object is equal to mass divided by velocity. In the video we saw how the car gets into a wall without paying attention‚ many people passed away because of texting while driving or not paying attention while trying to answer a call. Other people
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SUMMARY OF FRICTION The maximum force of static friction that exists between two surfaces is proportional to the normal force and mostly independent of area of contact. This situation is shown here: N = the total normal force (force perpendicular to the horizontal surface) which is essentially the weight of the object. The coefficient in that equation is called the coeffecient of static friction and that depends on the material: When the object is actually moving‚ the friction is said to be kinetic
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much work does a person do in pushing a box with a force of 10 N over a distance of 4.0 m in the direction of the force? (A) 0.4 J (B) 4.0 J (C) 40 J (D) 400 J (E) 4000 J 2. A person pushes a 10 kg box at a constant velocity over a distance of 4 m. The coefficient of kinetic friction between the box and the floor is 0.3. How much work does the person do in pushing the box? (A) 12 J (B) 40 J (C) 75 J (D) 120 J (E) 400 J 3. How much work does the force of gravity do in pulling a 10 kg box down a 30º
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UIC PHYSICS 105 Spring 2013 Practice Exam 1 UIC Physics 105 Midterm Practice Exam 1 Spring 2013 Best if used by February 17 PROBLEM Multiple Choice Short Problem 1 Short Problem 2 Short Problem 3 Short Problem 4 Short Problem 5 Short Problem 6 Total POINTS 40 10 10 10 10 10 10 100 SCORE Page 1 of 11 UIC PHYSICS 105 Spring 2013 Practice Exam 1 MULTIPLE CHOICE QUESTIONS (2 points each) Clearly circle the letter of the best answer MCQ 1: The figure to the right represents
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Procedure and Analysis: The lab began with the group making a rough estimate of the force required from each arm to lift the weight up to be about 700N per arm. We then drew a force diagram for the force acting on the barbell and when the lifter held the barbell over his head. Were: B= the angle=35 degrees Fn= The normal force m= mass g=gravity F= the force exerted by each arm We then used the following equation W = mg to calculate the weight of the barbell. Were: W= weight
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VCE Specialist Mathematics Pocket Study Guide Contents Introduction 1 Vectors in two and three dimensions 2 Complex numbers 3 Coordinate geometry and sketch graphs 4 Circular functions 5 Antidifferentiation 6 Integration 7 Differential equations 8 Kinematics 9 Vector calculus 10 Dynamics iv 1 12 26 40 53 62 70 79 86 92 Introduction What do you really need to know for Specialist Mathematics? We’ve answered that question in this Pocket Study Guide. This handy guide gives you a summary of
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success. This is imperative to dancers; most movement and technique can be improved dramatically by following Newton’s laws accordingly. By utilizing key physics concepts‚ a dancer can improve by locating the center of balance and determining the force vectors of a Grande Jette jump. Maintaining a strong center of balance is one of the key principles of strong dance technique. Whether dancers are working to control their turns or maintaining a position while standing on their toes‚ they are always instructed
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